The Manchester City striker suffered a muscular injury against Real Madrid which could keep him out of the Chelsea clash.
Warwickshire captain Alex Davies was the only player to score a century on Friday as the third round of matches began.
World number seven Stefanos Tsitsipas saved two match points to defeat Facundo Diaz Acosta and reach the semi-finals of the Barcelona clay-court tournament on Friday.Both men then saved more match points in the tie-breaker before Tsitsipas, a three-time runner-up at the Barcelona tournament, secured a ninth successive win following on from his Monte Carlo Masters title victory at the weekend.