MADRID, Feb 24 : Benfica assistant coach Joao Tralhao said his side's identity did not depend on any individual player as he declined to comment on the suspension of winger Gianluca Prestianni ahead of Wednesday's Champions League playoff second leg at Real Madrid.   Prestianni received a provisional one-match suspension from UEFA on Monday after he was accused of directing a racist slur at Real Madrid forward Vinicius Jr during the Spanish club's 1-0 first-leg win in Lisbon last week.  The 20-