British No 15 Clarke has struggled with injury but beat the former top-10 player in style, while fellow Brit George Loffhagen also notched a big win
Emma Raducanu has "rekindled" her love for tennis in recent weeks as she prepares to take on Sloane Stephens at Eastbourne.
Jay Clarke denies former world number eight Diego Schwartzman one final trip to Wimbledon by beating him in straight sets in the first round of qualifying.
Britain's Harriet Dart overcomes Marie Bouzkova in a topsy-turvy match to progress to the second round at Eastbourne.