Real Madrid's trophy aspirations could well depend on how well they cope with an injury crisis that sees Gareth Bale and Luka Modric in the treatment room.
Both were substituted during Real's 3-1 victory over Malaga in La Liga on Saturday and tests are being carried out to establish the extent of their injuries.
Bale appeared to hurt his calf and Modric his knee, and at the very least they are both likely to miss Wednesday's crunch Champions League quarter-final tie with city rivals Atletico Madrid with the contest tied at 0-0 from the first leg.
Karim Benzema also missed the Malaga match with a knee problem but the club are more optimistic that he will be ready to face Atletico.
"At the moment we can't say anything but we will evaluate the situation over the next few days," Ancelotti told a news conference.
"I think that he (Benzema) will be okay (to face Atletico) as he is improving. We have several days and he could well recover."
Real trail Barcelona by two points in La Liga with six matches still to be played and the loss of Modric as they looked to make up ground is particularly damaging.
The Croatian has become a fundamental player linking the midfield with attack with his quick thinking and clever passes.
Bale, meanwhile, has struggled for form in his second season at the club.
He scored crucial goals as Real won the Champions League and King's Cup and there were high hopes that he would build on those strong performances. But instead he has faced criticism over being too selfish on the ball.
Bale remains a key player but Real do have more options in attack where James Rodriguez, Isco or the fit-again Jese Rodriguez could all play.
Ancelotti has preferred to field a regular side rather than rotating players and now coming into the final stage of the season there are signs of fatigue that some feel could have contributed to the injuries.
The pressure is already on the Italian over the manner that Real lost their way after Christmas and with the high expectations at the Bernabeu it would be difficult to accept failure to win either La Liga, the King's Cup or the Champions League.
Modric set to miss rest of La Liga season with knee injury
Real Madrid midfielder Luka Modric has suffered knee ligament damage and could miss the rest of the La Liga season, the club said on Sunday.
Modric went off injured during the second half of Real’s 3-1 victory over Malaga on Saturday.
“A sprained medial collateral ligament of his right knee hasbeen diagnosed,” Real said in a statement on their website.
The loss of the Croatian is a major blow for coach Carlo Ancelotti ahead of the Champions League quarter-final against Atletico Madrid on Wednesday with the tie level at 0-0 after the first leg.
Modric is expected to miss six weeks which would rule him out of the final six games of the La Liga campaign with Real trailing leaders Barcelona by two points.
He could be available for the Champions League final on June 6 if Real make it.
Real winger Gareth Bale is also having tests on a calf injury after also going off injured against Malaga.
