LONDON (AFP) - Arsenal manager Arsene Wenger will make a decision on whether Cesc Fabregas will play in the vital Champions League game with Porto in the next 48 hours after the Spain star's latest injury setback.
Soon after scoring in Arsenal's 3-1 win over Burnley in the Premier League at the Emirates Stadium on Saturday, Gunners captain Fabregas suffered a recurrence of his hamstring problem.
He is now rated doubtful for Tuesday's last 16 second leg tie against Porto, where Arsenal will try to overturn a 2-1 deficit.
"Cesc has a hamstring and how deep the damage is we don't know because it's too early," said Wenger.
"We will see tomorrow (Sunday) or Monday, it will be a late decision on whether he plays on Tuesday."
Fabregas's injury came just a week after Arsenal lost fellow midfielder Aaron Ramsey for the rest of the season with a broken leg.
But there was better news for Wenger in the performance of England winger Theo Walcott on a day which ended with the third-placed Gunners two points off the top of the table after champions Manchester United returned to the summit with a 1-0 win away to Wolves.
Walcott, after a disappointing display during England's midweek 3-1 friendly win over Egypt at Wembley, was subjected to a blistering attack by former international Chris Waddle.
Waddle insisted Walcott did not understand football but the 20-year-old produced a menacing performance at the Emirates to silence his critics.
"I was delighted with Theo because I think he did what a player has to, not talking in the newspapers but doing his talking on the pitch," said Wenger.
"He didn't answer any critics other than it was a good performance today. He showed he is mentally strong.
"I was interested to see how we would respond and I was quite sure Theo would respond with a good performance.
"You never know how deep it affects you when you get criticised and the way he answered it at his age was remarkable."
Turning to Arsenal's quest for the title, which continues next week with another match against relegation-threatened opposition in Hull, Wenger said: "It's down to our consistency. If we win our games we will be there, that's for sure. Every game demands full focus and commitment, especially against teams fighting to stay up.
"Next weekend we play at Hull and we can expect the same sort of game. We had the chances to score plenty of goals (against Burnley) and we didn't take them. It was tight until the end when we could have scored four or five."
Fabregas gave Arsenal a 34th minute lead before his premature exit.
Burnley, who only have crisis club Portsmouth below them in the table, hit back through David Nugent's equaliser five minutes into the second half.
But Walcott's excellent strike on the hour and a goal from Arsenal substitute Andrey Arshavin condemned the Clarets to their 14th away defeat of the season.
Nevertheless Burnley manager Brian Laws said: "There were a lot of pleasing things to come out of it, despite the result.
"We responded much better in the second half because too many times the players have folded this season after going a goal behind.
"It was nice to get the goal and then to actually look in a comfortable position. We knew Arsenal were going to create chances and we lived a charmed life on many occasions.
"But Arsenal took their chances whereas we snatched at ours and that is the difference between the two sides," Laws added. "We had good spells and we've got to make them count.
"I'm going to take a lot of positives," he insisted. "This isn't going to be the game that decides our future in the Premier League, the ones at home will do that. I still think we can get that first away win."
|52||N. Bendtner||10' 25' 44' 90+1'|
|Coach: A. Wenger|
for T. Rosický 57'
for S. Nasri 73'
for A. Arshavin 77'
|Costa at the centre of Goodison controversy|
|Monk: Forty points remains the goal|
|Bundesliga ´speed of play suits me´ - Alonso|
|MLS Review: Sounders stay top, Jones makes New England bow|
|Montella stands by Brillante selection|
|Patience was the key, says Garcia|
|Copa Sudamericana Preview: Internacional still eyeing progression|
|Rodgers: I´ve brought Balotelli back to earth|
|Blanc braced for Saint-Etienne visit|
|Inzaghi hoping to get the best out of Torres|
|Simeone satisfied after Atletico settler|
|Roma sign Holebas|
|Primeira Liga Review: Ten-man Guimaraes cruise, Braga edge Estoril in game of stunning goals|
|Egypt 1 Kenya 0: Hosts limp to friendly victory|
|Eredivisie Review: AZ win in Van Basten´s absence, Heracles still pointless|
|Given out of international retirement for Ireland|
|Ligue 1 Review: Monaco falter without Falcao, Marseille win again|
|Serie A Review: Juventus and Roma off to winning starts|
|Rwanda fail to overturn AFCON disqualification|
|Guardiola: Ruthlessness will return|
|Atletico Madrid 2 Eibar 1: Nervous champions kick-start title defence|
|Martinez concerned by defensive frailties|
|Bundesliga Review: Leverkusen continue goal spree as Bayern held|
|League One Review: Peterborough go top as Chesterfield victory marred by racism claims|
|League Two Review: Morecambe halted, York draw fifth in a row|
|Allegri: Juve finishing must improve|
|Confusion reigns over Falcao future|
|Mourinho confirms Remy interest|
|Terry: Costa has everything|
|Warnock praises battling Palace|
|Everton 3 Chelsea 6: Costa at the double as Chelsea win nine-goal thriller|
|Southampton taught us a lesson, concedes Allardyce|
|Hughes hails ´outstanding´ Diouf winner|
|Schalke 1 Bayern Munich 1: Howedes seals controversial point for hosts|
|Man City should have had a penalty, says Pellegrini|
|Irvine bemoans ´worst possible start´|
|Chievo 0 Juventus 1: Allegri enjoys winning start|
|Simpson makes Leicester switch|
|Speculation mounts over Falcao exit|
|Poyet not content with current squad|
|Pardew slams Newcastle defence after Palace draw|
|Koeman delighted with Southampton belief|
|´Perfectionist´ Monk stays grounded|
|Championship Review: Leeds bounce back with win, Forest continue run|
|Scottish Premiership Review: Inverness march on, Ross County beaten again|
|Redknapp reveals Lassana Diarra capture|
|Newcastle United 3 Crystal Palace 3: Zaha equaliser earns Warnock a point|
|QPR 1 Sunderland 0: Austin steps into Remy´s shoes to earn hosts´ first win|
|Manchester City 0 Stoke City 1: Diouf off the mark as champions are beaten|
|Swansea City 3 West Brom 0: Flying start continues for Monk´s men|
|West Ham 1 Southampton 3: Schneiderlin nets double for visitors|
|We must remain patient, says Van Gaal|
|Dyche satisfied with Burnley style|
|Torres ready for ´new adventure´ at Milan|
|Van Gaal bemoans lack of cutting edge|
|J.League Review: Urawa Reds go three points clear at the top|
|Espanyol´s David Lopez set for Napoli switch|
|Redknapp confirms Remy deal|
|Luis Enrique hoping for more|
|Song joins West Ham on loan|
|Burnley 0 Manchester United 0: Van Gaal´s winless run goes on|
|West Brom announce Blanco signing|
|Ronaldo rested for Sociedad trip|
|Garcia deserves Spain call-up - Simeone|
|Scholes questions Blind move|
|Valdes to join ´big team´ this year|
|Gracia disappointed with referee|
|Blind set for United switch|
|Agger completes Brondby return|
|Gerrard relishing Real test|
|Sporting Kansas City 1 Houston Dynamo 3: Vermes´ side lose again|
|Arsenal can make Champions League final - Ozil|
|Simeone targets Eibar win|
|Vidal set to start, stay at Juve|
|Subotic: ´We all deserve a slap´|
|La Liga Review: Valencia beat unlucky Malaga|
|Ronaldo omitted from Portugal squad|
|Academica 1 Vitoria Setubal 1: Paulo Sergio´s men still waiting for first win|
|Marseille 4 Nice 0: Payet helps secure first home win for Bielsa|
|Go Ahead Eagles 1 Willem II 0: Vriends on target as hosts clinch win|
|Augsburg 2 Borussia Dortmund 3: Ramos strike proves crucial for visitors|
|McCarthy completes QPR switch|
|Paris Saint-Germain v Saint-Etienne: Injury-hit champions set for stern test|
|Tottenham v Liverpool: Rodgers downplays Balotelli arrival|
|Montpellier and Spurs agree Stambouli fee|
|Torres set for two-year Milan loan|
|Real Sociedad v Real Madrid: Ancelotti´s men on the road after departures|
|Bamford loaned to Middlesbrough|
|Gallifuoco makes Swansea move|
|Aston Villa v Hull City: Visitors seek Europa League hangover cure|
|Douglas completes Barca switch|
|Van Gaal hits out at Hodgson over Shaw|
|Villarreal v Barcelona: Rakitic grounded after promising start|
|Lallana poised for Liverpool debut|
|Mourinho bullish on Torres future|
|Clasie signs Feyenoord extension|
|Allegri raring to go|
|Two changes to Netherlands squad|
|Milan v Lazio: Inzaghi and Pioli reigns get under way|
|Costa still in contention for Everton|
|Squad size crucial for marathon season - Garcia|
|Leicester City v Arsenal: Wenger predicts tough challenge|
|Pellegrini hopes CSKA have learned lessons|
|Ibe opts for Derby switch|
|New faces in Spain squad|
|Holders Sevilla handed difficult Europa League draw|
|Egypt v Kenya: Williams era begins in Aswan|
|Pardew: Newcastle move key to Colback call-up|
|Van Gaal had not expected Rojo delay|
|Alonso: Kroos arrival not a factor|
|McGregor commits to Celtic|
|McGregor commits to Celtic|
|Low picks 18 World Cup winners for final rematch|
|Wenger coy over new signings|
|Redknapp ready to sign new QPR deal|
|Palace hand Bolasie new deal, table Traore bid|
|Alonso finalises move to Bayern Munich|
|Qualification a ´big step´ for Saint-Etienne|
|Thohir coy on Lavezzi talk|
|Faurlin injury curse strikes again|
|PSG president confident after Champions League draw|
|Hull closing on Hernandez deal|
|Warnock held Palace talks last year|
|Slomka cools Holtby talk|
|Slomka cools Holtby talk|
|Marotta confident of Juventus success|
|Marotta confident of Juventus success|
|Aguirre: New era for Japanese football|
|CONCACAF Champions League Review: Olimpia go top|
|Torino v Inter: Visitors out to maintain dominance|
|Copa Sudamericana Review: Penarol cruise into second round, Cesar Vallejo do it tough|
|Costa Rican Primera Division Review: Uruguay remain winless|
|Ronaldo backs Di Maria to shine at United|
|Argentine Primera Division Review: Velez stay perfect, Sanchez inspires River|
|Copa do Brasil Review: Cruzeiro win big, Corinthians lose|
|Barca wary of ´difficult´ opponents|
|Ronaldo confident after Champions League draw|
|´Not an easy´ draw for Dortmund|
|Bruce laments ´worst´ elimination|
|UEFA Europa League Play-Off Review: Lyon and Sociedad dumped out, Inter win big|