Sri Lanka captain Tillakaratne Dilshan has suffered a hairline fracture of his right thumb and will bat on the final day of the second Test at Lord's here on Tuesday only if "absolutely necessary", a team spokesman said.

Dilshan himself initially played down the extent of his injury after twice being hit on the thumb by England fast bowler Chris Tremlett while making 193 -- the highest individual Test score by a Sri Lankan at Lord's.