Real Betis midfielder Nosa Igiebor is a major injury worry ahead of the clash against Rayo Vallecano on Sunday, April 20.<br /><br />During training on Wednesday, the 23 - year - old suffered discomfort on his left knee and could not complete the exercise. <br /><br />The Nigeria international tried all he could to resume training but this was not successful, despite receiving treatment from club medic Dr. Tomas Calero.<br /><br />Nosa Igiebor&nbsp; managed to return to the pitch after that treatment but the problem persisted and he had to leave the pitch.<br /><br />He has made 11 appearances ( 1 goal ) for the Andalusian outfit this term. <br /><br /><br />