The Nigerian is a serious doubt for Chelsea's opening day Champions League clash against the Swiss side
Chelsea could be without Super Eagles midfielder John Obi Mikel for their opening Champions League clash against Basle on Wednesday due to a knee injury sustained in Sunday's match away to Everton at Goodison Park.
The midfielder who made his first start in the league against Everton had treatment on the knee injury on Monday.
Though the Nigerian trained on Tuesday morning, his right knee was heavily strapped and with support tape down the back of the knee.
Chelsea are already without Ramires, who got sent off in the Uefa Super Cup clash against Bayern Munich – a match Chelsea lost on penalties after a 2-2 result after extra time.
Chelsea beat FC Basle on their way to winning last season’s Uefa Europa League and Frank Lampard may have to be recalled into the starting line-up after missing out against Everton last Sunday.