I don't know..... Willian has definitely more pace and stamina than Oscar, but Oscar always seems to press the ball better than Willian. Always, defensively, chelsea has always looked better when oscar played thru the middle....Willian definitely had to cover for Ivan the striker, but Oscar helped the whole middle of the field in cesc, matic, cahill and terry. Even if Jt is old, we shouldn't be giving up 7 goals in the first 3 games of the season....