By Ben Rumsby The Boat Race was under major pressure to introduce drug testing on Thursday after Sir Steve Redgrave spoke out over its lack of doping controls. Redgrave, regarded by many as Britain’s greatest Olympian, told Telegraph Sport ahead of Sunday’s contest between Oxford and Cambridge universities that all sporting events should be subject to in-competition testing. The absence of such testing at the Boat Race has previously provoked alarm among former rowers, anti-doping crusaders and MPs, with Telegraph Sport having been told after its last running two years ago that organisers had ignored calls to introduce such checks.