Ex-India opener Wasim Jaffer said India wicketkeeper-batter Wriddhiman Saha, who scored 61* in second innings in India-New Zealand first Test, is one of those guys who plays to his "optimum" whenever he gets an opportunity. "We know how fine a wicketkeeper Saha is. But, even with a stiff neck and not being on field, he came on...did...rescue job," he added.