Everton may be without Tim Cahill for this weekend's Premier League clash with Manchester United after the Australian picked up a calf problem during Tuesday's Europa League clash with Sporting Lisbon.
The midfielder's possible absence is yet another injury blow for Toffees boss David Moyes who had earlier confirmed that Marouane Fellaini's season is over.
Cahill had to be substituted after 62 minutes of the 2-1 victory against the Portuguese side, a result that leaves the last-32 tie on a knife-edge after the visitors scored a last-gasp penalty.
Moyes confirmed after the match: "Cahill may have a calf strain, we're not sure of the severity yet.
"I thought we didn't go for it enough at 2-0. We looked as if we were conserving energy or not going for that third goal.
"We did enough to be 2-0 in front. I didn't really see a goal coming for Sporting, if anything I saw another goal coming for Everton and I thought we were more liable to get a third goal. But that's what keeps the game alive, that's football.
"I think we've given Sporting an opportunity when maybe they didn't look as if they were going to have one tonight. But they've got an opportunity and we need to go to Lisbon now and do a very good job."