Second meets third in League Two on Saturday as Burton Albion host Oxford United at the Pirelli Stadium.
Chris Wilder's men are level on points with Burton but sit in second thanks to their superior goal difference.
The two sides are unbeaten so far this term and a win for either could put them top, if leaders Chesterfield drop points against rock-bottom Accrington Stanley.
However, Paul Cook's men will be overwhelming favourites for the tie against his former employers, with the visitors having picked up just one point from their opening five fixtures.
Cook's side clinched top spot with a 2-0 win over Portsmouth last time out but he believes there are still improvements to be made.
"I never try and kid our fans and make out that everything’s great, we haven’t played well the last couple of games but we’ve got two fantastic results," he told the club's official website.
"We must work very hard in training, we must be bright with our passing, we must be more inventive and we must work harder to win games."
With just two points separating Oxford in second and Southend United in seventh, the four teams in the play-off spots will be aware of the importance of a win.
Fourth-place AFC Wimbledon travel to Bootham Crescent to face a York City side without a win since the opening day while, a place below, Exeter City travel to Dagenham and Redbridge.
Fleetwood Town will look to bounce back from their 2-0 defeat to Wimbledon when they welcome Torquay United as Southend seek to avoid three consecutive defeats against a buoyant Morecambe who have won their last two league matches.
Hartlepool United, fresh from their 5-0 Football League Trophy win over Bradford City on Tuesday, can pick up their first win of the season in the league against Wycombe Wanderers at Victoria Park.
Forward Andy Monkhouse believes his team-mates can bring their belief from the victory into the league, where they are yet to find the net this term.
"By the end (of the Bradford game) it could have even been more than five goals," he told the club's official website.
"Towards the end everyone wanted the ball, people were trying tricks, we were all running and tackling – I think the belief was there for all to see."
Northampton Town hover precariously above the drop zone, with just one win to their name this season, but Aidy Boothroyd's men can move clear of the bottom two when they host Scunthorpe United.
Cheltenham Town are in similar trouble at the bottom and will need to keep David Connolly quiet when they take on Portsmouth, with the 36-year-old having struck four times so far this season.
The two sides promoted from the Conference Premier last season, Newport County and Mansfield Town, meet for the first time in the league on Saturday, having made impressive starts to their domestic campaigns.
Both have lost just once in their five games and can move into the top seven with victory.
South west neighbours Plymouth Argyle and Bristol Rovers meet at Home Park while there is a Lancashire derby at Spotland as Rochdale host Bury.
|Coach: G. Rowett|
for M. Symes 37'
for R. Howe 76'
for L. Bell 76'
|Serie A Review: El Shaarawy at the double in Milan victory, Fiorentina edge five-goal thriller|
|Taylor close to signing new Swansea contract|
|Milan 3 Torino 0: El Shaarawy grabs brace as Inzaghi´s men ease to victory|
|Bruce expresses sympathy with Hull owner and fans following relegation|
|Preston North End 4 Swindon Town 0: Beckford hat-trick seals promotion|
|Darmstadt promoted back to the Bundesliga after 33-year exile|
|Sherwood to assess Given injury ahead of FA Cup final|
|Europa League qualification would cap ´special´ season - Koeman|
|South Africa 0 Botswana 0 (6-7 on penalties): Hosts exit COSAFA Cup at first hurdle|
|Pearson hopeful of Cambiasso stay|
|Ings emotional after victorious ´last game´|
|Pochettino happy to finish fifth|
|West Brom release Mulumbu|
|Monk: Palace defeat not a reflection on season|
|LVG awaits news on ´minor´ Di Maria injury, refuses to comment on Falcao exit reports|
|Pulis accepts blame for West Brom´s Arsenal collapse|
|Toure and Milner were not saying goodbye - Pellegrini|
|Ramsey calls for patience in QPR rebuild|
|Allardyce: Time is right for West Ham exit|
|Mourinho already preparing for title defence|
|Eredivisie Review: Heerenveen to play Vitesse for Europa League place|
|Hughes hails Stoke showing|
|Carver still hoping to land Newcastle job|
|Sunderland squad needs better balance, says Advocaat|
|Pardew ´never dreamt´ of top-half finish at Palace|
|Survival Sunday: How the final-day Premier League relegation battle played out|
|Arsenal wanted Walcott stay regardless of hat-trick - Wenger|
|Bruce: Hull have not been good enough|
|De Gea has to say something - Van Gaal|
|Rodgers apologises after ´embarrassing´ defeat|
|Chelsea 3 Sunderland 1: Remy double secures win as Drogba bids farewell|
|Stoke City 6 Liverpool 1: Gerrard nets consolation in final-game thrashing|
|West Ham confirm Allardyce exit|
|Newcastle United 2 West Ham 0: Gutierrez on target as Carver´s men stay up|
|Crystal Palace 1 Swansea City 0: Chamakh earns season-closing win|
|Manchester City 2 Southampton 0: Lampard bids Premier League farewell with goal|
|Hull City 0 Manchester United 0: Bruce´s men relegated|
|Aston Villa 0 Burnley 1: Ings heads winner|
|Everton 0 Tottenham 1: Kane header seals fifth place|
|Leicester City 5 QPR 1: Vardy celebrates England call-up in style|
|Arsenal 4 West Brom 1: Wilshere screamer and trio for Theo secures third|
|Drogba carried from the pitch by Chelsea team-mates|
|Scottish Premiership Review: United take Dundee derby spoils, Celtic smash Inverness|
|Ashley not leaving Newcastle until club wins something|
|Klopp urges fans not to draw comparisons with Tuchel|
|Dortmund complete Castro capture|
|Stevens leaves Stuttgart after securing safety|
|Alves ruled out of Copa with serious knee injury|
|Drogba to leave Chelsea|
|Ashley is from another planet - Keegan|
|Sydney withdraw Janko offer amid talk of Toni|
|Cameron pens Stoke extension|
|Wimmer: I´m going to Tottenham|
|Returning Grabban ready for play-off final - Neil|
|Ferdinand ´overwhelmed´ by support following wife´s death|
|Odegaard enjoys ´nervous´ Real Madrid debut|
|Bamford fit but may be overlooked for play-off final|
|Barcelona´s best better than Real´s - Luis Enrique|
|Ancelotti laments key injuries in title failure|
|AFC Champions League Preview: Evergrande, Al Hilal desperate for wins|
|MLS Review: DC United deny nine-man Revolution, Rapids break drought|
|Bielsa hints at Marseille departure, congratulates Ligue 1|
|Silva, Matuidi eye fourth trophy|
|Jonas deserved golden boot - Jorge Jesus|
|Primeira Liga Review: Benfica celebrate title with home win|
|Ligue 1 Review: Monaco seal final Champions League spot, Marseille take fourth|
|Ancelotti to take sabbatical if sacked by Real|
|Mancini annoyed by ´absurd´ Inter mistakes|
|Simeone hails ´incredible season´|
|Replacing Xavi will be impossible - Luis Enrique|
|Ronaldo hopes Ancelotti will stay|
|Guardiola: We´ll be back stronger|
|Paris Saint-Germain 3 Reims 2: Cavani double sees champions celebrate title with routine win|
|Garitano stands down following Eibar relegation|
|Genoa 3 Inter 2: Kucka strikes blow to visitors´ Europa quest|
|Real Madrid 7 Getafe 3: Ronaldo nets treble and Odegaard makes history|
|Southend United 1 Wycombe Wanderers 1 (aet, 7-6 on penalties): Last-gasp Pigott and Bentley the hero|
|Odegaard becomes Real´s youngest player|
|Gargano omitted from Uruguay Copa America squad|
|La Liga Review: Depor save themselves with stunning comeback at Barca|
|Barcelona 2 Deportivo La Coruna 2: Salomao saves visitors as Xavi bids Camp Nou farewell|
|Granada 0 Atletico Madrid 0: Atleti secure third as hosts survive|
|Juventus 3 Napoli 1: Champions turn on the style|
|Tearful Klopp struggled to say goodbye|
|Scottish Premiership Review: Rangers to meet Motherwell in play-off final|
|Bundesliga Review: Freiburg and Paderborn relegated|
|Borussia Dortmund 3 Werder Bremen 2: Dortmund seal European spot as Klopp says farewell|
|Bayern Munich 2 Mainz 0: Schweinsteiger nets as champions celebrate title|
|Championship play-off final Preview: Karanka and Neil eye swift ascent to Premier League|
|Volland commits to Hoffenheim|
|Monk: Michu likely to move on|
|Allardyce not interested in Newcastle revenge|
|Sherwood confident of Benteke Villa stay|
|Rodgers calls on Liverpool fans to support Sterling|
|Khedira ´frozen out´ by Real|
|Hamstring injury rules Suarez out of Deportivo clash|
|Former Southampton managers hail ´excellent season´|
|Mourinho wants to remain in England after Chelsea|
|Rodgers ´150 per cent sure´ his job is safe|
|Maldini would ´love´ to help Milan|
|Doyle set for Rapids debut versus Whitecaps|
|MLS Review: Champions end winless run on day of late drama|
|Jemez doubted Rayo future|
|Zenga could replace Mihajlovic - Osti|
|Blanc wants to avoid Chelsea-like finish|
|Menez happy in Milan|
|Sherwood: Vlaar wants to stay|
|Arsenal v West Brom: Wenger calls for focus|