Swansea face an anxious wait to discover the extent of the ankle injury which forced Michu out of today's goalless draw with Reading at the Madejski Stadium.
Swans manager Michael Laudrup said: "His ankle is twice as big now. We don't know how bad it is. The doctors and the physios say it shouldn't be the ligaments, which is the most important thing.
"The next question is 'will he play on Saturday?' I don't know. We will have to wait 24 hours. Hopefully it is not too bad. It is not a muscle injury but still we have to be careful. He has to be 100 per cent.
"He is one of the top scorers in the league, definitely our top scorer. He has played nearly every match this season.
"Even if he is the most important player, we have to deal with it (if he is out). If you rely so much on one or two players it is not good for any team." Laudrup's men dominated the first half but in the end were left clinging on for the points, with Chico Flores heading Adam Le Fondre's volley over the bar.
"I am satisfied with the performance, not so much the result,'' Laudrup said. "We dominated for 75 minutes and we could have won the game. The performance was good."
For Reading, the draw ended a run of seven consecutive defeats.
"We need to find a way to get results and today we got a result," manager Brian McDermott said.
"We are disappointed they didn't give us the handball goal because they normally give them here. Adam would have headed it but he said he got pulled back.
"We were much more resilient, it is important to move on with a point and we can look forward with confidence to West Ham.
"We have got a point and a clean sheet and we are off the bottom of the table."