The Portland Timbers were awaiting test results on Darlington Nagbe's left ankle following a scary injury Sunday night against the Los Angeles Galaxy.
Nagbe, who also has been playing for the U.S. national team, had to be taken from the field by stretcher after he was tackled roughly by Galaxy midfielder Nigel de Jong.
Referee Allen Chapman gave de Jong a yellow card for the challenge, but Major League Soccer's disciplinary committee could issue a suspension.
Nagbe, 25, left the match in a wheelchair.
Timbers coach Caleb Porter expressed concern after the game that de Jong was not shown a red card. If de Jong is suspended, it would mark the third straight week that Portland has seen an opposing player suspended after the fact.
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