Manchester United manager Jose Mourinho is hoping for the best after Marcus Rashford limped off with a knee injury.
The 19-year-old forward secured a 1-0 victory at Benfica after his free-kick caught out teenage goalkeeper Mile Svilar in Wednesday's Champions League encounter.
But shortly afterwards Rashford sat frustrated on the deck with a knee injury that forced him out of the Group A clash.
"Marcus Rashford, I thought was cramps because he was running so much that I thought it was about muscular fatigue," Mourinho said.
"But, no, he told me he was feeling something in his knee. It didn't look for me a big thing but you never know."
Phil Jones should return to fitness in Saturday's Premier League match at Huddersfield, but fellow centre-back Eric Bailly remains side-lined.
Marcos Rojo and Zlatan Ibrahimovic continue their comeback from serious knee ligament injuries, while midfielders Michael Carrick, Paul Pogba and Marouane Fellaini are currently out injured.
Antonio Conte responded to Jose Mourinho's veiled barb after Chelsea conceded a two-goal lead to draw with RomaRead the full story ›
Jose Mourinho says he doesn't plan on signing a new contract with Man United imminently, but has played down talk he will leave for PSGRead the full story ›
All of Monday's football rumours; What do Jose Mourinho's latest comments mean for his Manchester United futureRead the full story ›
Jose Mourinho has ruled out spending the rest of his career at Manchester United.
The Red Devils manager said in an interview with French television that he was certain he would work elsewhere.
Mourinho was appointed by United in May 2016 and led the club to the Europa League title last season.
His side are vying with neighbours Manchester City for top spot in the Premier League this term, but 54-year-old Mourinho is keeping his future options open.
He told TF1's Telefoot programme: "The only thing I can say is that I'm still a coach with worries, with ambitions, and with the desire to do new things.
"And I don't believe... no, I'm sure that I won't end my career here."
Asked if that meant at Manchester United, Mourinho said: "Yes."
Mourinho was responding to the question of whether he might one day be tempted to join Paris St Germain.
And Mourinho explained his son has taken the French capital giants to his heart.
"The other day, my son who lives in London went to Paris and not to Manchester to watch the match," Mourinho said.
Asked why his son chose that option, Mourinho said: "Because at the moment in Paris there is something special. Magic, quality, youth, it's fantastic."
Former translator Mourinho, who showed his multilingual skills by conducting the interview in French, has previously had high-profile spells in charge of Porto, Chelsea, Inter Milan and Real Madrid.
Mkhitaryan has vowed United will put Mourinho's "Playstation football" criticism to the back of their minds when they take on CSKA Moscow.Read the full story ›
Manchester United manager Jose Mourinho will face no further action from the Football Association following his sending-off against Southampton on Saturday.
The 54-year-old was sent to the stands by referee Craig Pawson for encroaching on the pitch during stoppage time of his side's 1-0 win at St Mary's.
Unlike players, however, there are no automatic bans for red-carded managers and any additional punishment depends on the referee's report.
In this case, Mourinho appears to have taken the referee's decision without any further comment or reaction and the matter is closed.
The FA is also taking no action at this point against United for its fans singing the controversial chant about striker Romelu Lukaku.
The club are understood to be liaising with Southampton to gain access to CCTV footage of Saturday's crowd so it can identify those responsible.
Jose Mourinho praised the influence of his central defensive pairing of Eric Bailly and Phil Jones after Manchester United beat SouthamptonRead the full story ›
Jose Mourinho has said Luke Shaw "has to improve" if he wants to force his way into Manchester United's team.Read the full story ›
Jose Mourinho will name a strong Manchester United side against Burton, although changes are expected for the Carabao Cup encounter.
Captain Michael Carrick, left-back Luke Shaw and midfielder Scott McTominay are pushing for their first minutes of the season, so too is goalkeeper Sergio Romero.
Paul Pogba (hamstring) and Axel Tuanzebe (back) are out of the third-round tie, joining Marcos Rojo and Zlatan Ibrahimovic (both knee) on the sidelines.
Manchester United squad: De Gea, Romero, Pereira, Valencia, Darmian, Lindelof, Bailly, Jones, Smalling, Blind, Shaw, Young, Fellaini, Matic, Herrera, Carrick, McTominay, Mata, Lingard, Mkhitaryan, Lukaku, Rashford, Martial.