Wesley Fofana opened the scoring against Milan but then picked up an injuryGraham Potter admitted he 'does not know the extent of the injury'The Chelsea boss called it the 'one disappointing thing' about the eveningHe also praised England right back Reece James as a 'fantastic player'
See Details: 'We don't know the extent yet': Chelsea anxiously await an update after their new £70m signing Wesley Fofana injured his knee in their 3-0 Champions League win over AC Milan