Manchester City manager Pep Guardiola has warned that striker Gabriel Jesus could be out of action for up to three months and may not return until next season.
The Brazilian forward limped out of City's Premier League win at Bournemouth on Monday Night Football after just 13 minutes.
According to ESPN Brasil reporter João Castelo Branco, Manchester City will not release an official statement until Pep Guardiola's press conference on Friday.
"Now it is important he makes a good recovery". I don't know if it will be the end of the season or next season.
"Now we're giving all our support to him and his family and waiting for him to come back".
With the injury suffered to Gabriel Jesus, Shaka Hislop and Ross Dyer discuss how Sergio Aguero will fit back into the starting XI.
"It is only every so often that you watch a great player who renews your love and passion for the sport but that's what has happened to me whenever I watch Gabriel Jesus".
He may no longer be president but Inter legend Massimo Moratti has advised the club that to make a move for Gabriel Jesus some day. Sergio was more than professional. Not just Sergio, all the players. Being more than professional is impossible, so it was flawless - Sergio did that.
"He came in and played well, and was involved in the second goal".
But, before then, Guardiola must decide whether to recall talismanic veteran Sergio Aguero as Jesus's replacement - and run the potential risk of an injury ruling him out of the Monaco game - or recall Nigerian understudy Kelechi Iheanacho who, despite a prolific scoring record, appears to have fallen out of favour with Guardiola in recent weeks.
City take on Huddersfield Town in the FA Cup fifth round on Saturday.