Jack Wilshere will be assessed ahead of Arsenal's weekend trip to Bournemouth after the midfielder sustained an ankle injury in the EFL Cup semi-final at Stamford Bridge.
Arsene Wenger's side held out for a 0-0 draw in Wednesday's first leg but lacked the early control Wilshere gave to their performance when he limped off before the hour.
The England international has battled back into contention at Emirates Stadium this season, having been plagued by persistent ankle worries over recent years.
This setback does not appear to be as serious for the 26-year-old but Wenger told reporters he had suffered a sprain.
"He has an ankle sprain and the first look at it was not too bad, but of course for Sunday I think he will be short," said the Frenchman, who watched the match from the press seats as he continued to serve a touchline ban.
"I do not know how long he will be out. It is a shame to lose him when he is in such good form and it was by blocking the shot that turned his ankle. It's his good ankle so I am quite positive."
Wenger confirmed on Sky Sports that Francis Coquelin is on the verge of a move to Valencia and hopes Aaron Ramsey (hamstring) will soon be available to help with his midfield shortfall.
"We have five big injures and hopefully we will get some back," he said.
"I believe the first to come back will be Ramsey and that is good because it is an area where we are quite short at the moment."
Arsenal survived a late VAR review when Danny Welbeck challenged Cesc Fabregas in his own box and, even though referee Martin Atkinson's original decision of no foul was upheld, Wenger admitted to some nervous moments in the stands.
"I didn't see the replay on television. They made that decision so we had to respect it," he said.
"I was worried that it took too much time. I thought maybe there were not sure that it was not a penalty and were looking at it again and again."
|Chongqing sponsor ´positive´ over Iniesta deal|
|Valverde´s quiet crisis management leaves Barca ready to clean up|
|Vieira ´flattered´ by Arsenal link|
|Wenger was sacked by Arsenal, Wright claims|
|Dyche eager to feature in ´legendary´ Wenger´s Emirates farewell|
|United and City ´a million miles apart´, says Parker|
|Pogba must ´take more responsibility´, says Matic|
|Sporting Kansas City 6 Vancouver Whitecaps 0: Russell stars with hat-trick|
|I don´t fear the challenge – Klopp eager to close gap to City|
|Everybody wants to play under him – Ozil pays tribute to Wenger|
|Conte defends Chelsea record compared to Mourinho|
|LaLiga strugglers Espanyol show Flores the door|
|Messi is an alien but Sevilla can bring Barcelona back down to Earth, insists Montella|
|Reims´ latest vintage secure promotion to Ligue 1|
|Millwall 0 Fulham 3: Sessegnon on target as Jokanovic´s side go second|
|Ancelotti welcomes Arsenal links, praises Wenger decision|
|I think Arsenal would be good for a German coach - Podolski|
|Wilshere, Ramsey, Mertesacker and the best social media reaction to Wenger´s Arsenal departure|
|Exeter left ´disappointed´ by Ampadu transfer verdict|
|Copa del Rey glory a good way to put European exit behind us, says Valverde|
|LMA hails Wenger´s impact at Arsenal|
|Wenger passes the torch as Arsenal face up to his formidable legacy|
|Gazidis: Arsenal cannot replace Wenger – we need a new path|
|Van Bronckhorst using Wenger´s methods at Feyenoord|
|I´d break another finger to win the Copa del Rey - Rakitic|
|Arsene Wenger: The Arsenal manager´s worst moments|
|Wright: More Arsenal changes needed after Wenger exit|
|Guardiola wishes Iniesta the best ahead of potential Barcelona exit|
|Real football people appreciate Wenger - Moyes, Warnock and more pay tribute|
|Guardiola set for contract talks with Manchester City|
|Liverpool top, DVDs just invented and no Harry Potter – The world when Wenger joined Arsenal|
|Heynckes cannot compare Lewandowski and Ronaldo|
|Ronaldinho, Ronaldo, Messi, Mbappe and more – the stars Wenger claims he could have signed|
|Ferguson: Rival, colleague and friend Wenger is one of the greatest|
|Gattuso wary of challenge for Milan´s European place|
|Neuer returns to Bayern training after seventh-month absence|
|Wembley no advantage for Spurs in semi-final, warns Mourinho|
|PSG, Monaco, the CSL, France? - Wenger´s possible next moves|
|Wenger ´an example´ to foreign Premier League managers like Benitez|
|Wilshere: Wenger is like a father|
|Guardiola wants Wenger to find new role in football|
|Henry: Wenger´s Arsenal legacy is untouchable|
|Mourinho: Wenger feud shows how much I respect him|
|Conte: Top four still possible for Chelsea|
|Aguero out for the season - Guardiola|
|Wenger´s 22-year Arsenal tenure will not be matched, says Conte|
|Celtic would let Rodgers move to Arsenal|
|Squillaci, Cech & Wenger´s worst signings at Arsenal|
|Heynckes: I cannot imagine Wenger at another club|
|Thank you Arsene - Emery pays tribute to Wenger|
|Fabregas and Van Persie join tributes to Arsenal boss Wenger|
|1,228 matches and seven FA Cups - Wenger at Arsenal in Opta numbers|
|Mertesacker ´emotional´ as Wenger announces Arsenal departure|
|Ancelotti, Tuchel, Henry – Where do Arsenal turn after Wenger?|
|Klopp doesn´t want Liverpool to chase Golden Boot for Salah|
|´The Arsene Wenger Stadium´ - Former Arsenal players call for tribute|
|Wenger was so good ´it was scary´, says Merson|
|I fell in love with playing for Wenger - Winterburn|
|Van der Sar urges Kluivert to continue Ajax development|
|Klopp pays tribute to ´outstanding´ Wenger|
|Wenger´s consistency will never be matched – Kroenke hails Arsenal manager´s legacy|
|Arsene Wenger: The Arsenal manager´s best moments|
|Vieira, Henry and Wenger´s best signings at Arsenal|
|Wenger to stand down as Arsenal manager|
|Ibrahimovic not in Sweden´s plans despite latest World Cup hint|
|Rafinha confident over fresh Bayern deal|
|Perth Glory sack Kenny Lowe|
|Copa Libertadores Review: Lopez misses two penalties as Racing crush Vasco|
|Gunes hospitalised after suffering head injury in abandoned Fenerbahce-Besiktas clash|
|Thiago Silva eyeing PSG exit amid criticism|