Roberto Martinez is refusing to let David Moyes' return to Everton with Manchester United distract his side from the race for the top four.
Moyes spent 11 years as Everton boss between 2002 and 2013, in which time he led the club to the UEFA Champions League qualifying rounds and an FA Cup final appearance, and returns to Goodison Park for the first time on Sunday.
But with Everton aiming to qualify for Europe's premier club competition for the first time since 2005, Martinez is calling on his side to concentrate on the job in hand.
"David Moyes had an incredible past with our football club and that's always going to be in everyone's mind, but I think that the game is so important," he said.
"The three points are very significant for both clubs. Once the whistle goes, that is going to be the main focus."
Moyes has endured a frustrating first campaign as Alex Ferguson's successor at Old Trafford, with United on course for their worst Premier League placing, having previously never finished outside the top three.
Juan Mata arrived from Chelsea in January in a bid to revive the club's flagging fortunes, and the Spaniard has backed his new manager to turn things around next term.
"I have no doubt about it," he is quoted as saying in The Daily Mirror .
"When I joined, in all my conversations with the board and the manager about next season, they were confident about getting the right players.
"I'm sure this club is going to come back and fight for every trophy. Since I was a kid, Manchester United was fighting for everything, and this moment is going to come back for sure."
United come into the game in seventh, nine points behind their fifth-placed opponents, with Everton fans enjoying a fine season under Martinez.
Everton have enjoyed a resurgence under Martinez that has seen them pick up impressive home wins over Chelsea and Arsenal, while a 1-0 triumph at Old Trafford earlier in the season highlighted the advances they have made with the Spaniard.
Wednesday's surprise 3-2 home defeat to Crystal Palace left them one point behind Arsene Wenger's men with four games to go, and they will continue to be without Steven Pienaar (knee) on Sunday, while Phil Jagielka (hamstring) could be fit enough for a place on the bench.
Robin van Persie will once again be missing for United due to a knee injury, but former Everton pair Wayne Rooney (toe) and Marouane Fellaini (knock) are expected to feature.
|Coach: Roberto Martínez|
for S. Distin 46'
for R. Barkley 70'
for K. Mirallas 90+4'
|Zidane champions ´undying belief´ of Real Madrid saviour Ramos|
|Real Madrid 3 Deportivo La Coruna 2: Ramos to the rescue again for BBC-less hosts|
|Real Madrid set new 35-match unbeaten record|
|Terror attack at home of Besiktas condemned|
|Ranieri: Big champions react at the right moment|
|Guardiola defends tactics as City falter again|
|Wenger confirms Mustafi to miss three weeks|
|Iniesta: Barcelona never despaired against Osasuna|
|Leicester City 4 Manchester City 2: Vardy back in business as champions upset City|
|Snodgrass apologises after controversial penalty|
|Falcao´s first hat-trick in four years sends Monaco top of Ligue 1|
|Bosz confirms Bazoer´s imminent departure|
|Moyes: Swansea penalty the wrong decision|
|Ancelotti delighted after Muller finally scores|
|Dyche blasts ref for giving Bournemouth lifeline|
|Equaliser hurt us, concedes Hughes|
|Pardew sympathises with referee after Snodgrass penalty|
|Bradley delighted by Swansea response and clean sheet|
|´We´re going to s***´ - Mina disgusted as Valencia lose again|
|FACT: Vardy ends drought as Man City make worst start in 10 years|
|Wenger lauds Arsenal composure in comeback triumph|
|Tuchel: Reus is irreplaceable for Borussia Dortmund|
|Alba: Messi hasn´t spoken about new contract|
|Ingolstadt 1 RB Leipzig 0: First defeat knocks newcomers off top|
|Hull City 3 Crystal Palace 3: Campbell equaliser buys Pardew time|
|Burnley 3 Bournemouth 2: Hendrick stunner helps Burnley to victory|
|Swansea City 3 Sunderland 0: Llorente double eases pressure on Bradley|
|Arsenal 3 Stoke City 1: Gunners battle back to move top|
|Cologne 1 Borussia Dortmund 1: Reus salvages draw with late equaliser|
|Inter boss Pioli wary of Milan and Juventus conquerors Genoa|
|Bayern Munich 5 Wolfsburg 0: Muller breaks duck as hosts go top|
|Jozy Altidore and Christian Pulisic honored with US Soccer awards|
|Too passive and too reactive - Koeman slams Everton after Watford defeat|
|Luis Enrique challenges Barcelona to pile pressure on Madrid|
|Deeney: More to come from two-goal Okaka|
|A-League Review: Berisha the hero for Melbourne Victory|
|Allegri: Turin derby is dangerous for Juve|
|Suarez refuses to give up LaLiga title fight|
|Watford 3 Everton 2: Okaka double adds to Toffees´ away-day woes|
|Osasuna 0 Barcelona 3: Messi magic ends frustrating run of draws|
|Emery does not fear PSG sack|
|Eder adamant Inter can still reach Champions League|
|Montreal Impact claim Dzemaili coup|
|Ventura: Belotti like Ronaldo and Buffon|
|Manchester United have duty to entertain - Valencia|
|Barry set to go joint-second in all-time Premier League appearance list|
|Ventura: Buffon welcome in Italy coaching set-up|
|Marseille stump up for 160 fans´ Dijon stays|
|Gabriel will only go on loan to a club on Inter´s level, says agent|
|Bayern do not bow to economic force - Hoeness|
|All clubs would want Sturridge, says Bilic|
|Seaman urges Arsenal to spend big on keeping Sanchez and Ozil|
|Bravo happy to accept criticism for City showings|
|Origi reveals United, Bayern snubs|
|Cavani: I´d like to play with Griezmann one day|
|Aguero is not aggressive, claims Guardiola|
|Ibrahimovic wants United to be ruthless|
|Sanchez can be Arsenal´s new Henry - Wenger|
|Andre Gomes can play in Busquets role, insists Luis Enrique|
|Aguero´s dangerous tackle scared me, says Conte|
|Guardiola: We are killing the players|
|Bournemouth announce plans for new stadium|
|Former Bayern Munich and Real Madrid star Ze Roberto to play beyond 43rd birthday|
|Barcelona friendly awaits new Chapecoense coach Mancini|
|Arsenal are privileged to have Sanchez and Ozil - Monreal|
|Watzke denies agreement to discuss Aubameyang transfer with Madrid|
|Paris Saint-Germain v Nice: Champions hunting down shock leaders|
|Giggs tells Rashford how to end his goal drought|
|Manchester United without Shaw, Smalling for Tottenham clash|
|Willems inks PSV renewal|
|Costa and Conte scoop Premier League awards|
|Conte detained on suspicion of assault|
|Strootman ban for derby ´simulation´ overturned|
|Mourinho demands more goals from Rooney|
|Bobo preserves Sydney´s unbeaten start in Cup final rematch|
|Luis Enrique: I don´t dare predict if Messi will renew|
|Mourinho admits changing style for United|
|Sanchez talk is disrespectful, says Conte|
|Sassuolo 0 Genk 2: Visitors seal top spot|
|Sterling back for City as Guardiola predicts tough Leicester test|
|Mourinho still the ´Special One´ for Pochettino|
|Matic return leaves Conte with Fabregas dilemma|
|Guardiola expects greater impact from City youngsters next season|
|Klopp defends Karius after Bournemouth blunder|
|Pirlo visits Chelsea - but Conte is not signing him|
|Ronaldo, Modric rested for Deportivo clash|
|Tuchel hails returning Reus|
|Klopp has ´no idea´ on Sturridge return|
|´My players are intelligent and good people´ - Zidane on Ronaldo´s taxes|
|Atletico to play at ´Wanda Metropolitano´|
|Real Madrid to rest Benzema and start Morata against Deportivo|
|Ancelotti rules out Draxler bid as Bayern prepare for barren transfer window|
|Ighalo calls on Watford to sign Mikel|
|Pardew wants defender and striker to bolster Palace survival push|
|Moyes: M´Vila doesn´t have the fight for Sunderland|
|Leipzig only built to earn Red Bull money - Watzke|
|Shenhua director blasts CSL imports... but desperate for Tevez deal|
|Ribery: Bayern my last club in Europe|
|Hughes targets Arsenal fans to help Stoke end dismal away run|
|83 suspects, 98 clubs ´impacted´ in football abuse probe|
|Fowler pleads with Liverpool to keep ´top quality´ Sturridge|
|Reus ´100 per cent different´ on comeback|
|Ibrahimovic ´super happy´ for rejuvenated Mkhitaryan|
|Vertonghen: Football needs Mourinho|
|Title triumph went to Leicester´s heads, admits Ranieri|
|Conceicao named new Nantes coach|
|LaLiga lead means nothing - Zidane|
|Chapecoense add two stars to badge in wake of air disaster|
|Blatter accuses Infantino of lack of respect|
|Austin injury compounds Puel´s misery|
|Gestifute publishes further evidence of ´Ronaldo tax compliance´|
|Pioli eyes further Inter improvement|
|´I feel s***´ - Van Dijk blasts Southampton after Europa League collapse|