Jay Alexander Clarke (born 27 July 1998) is a British tennis player, who competes on the ATP Challenger Tour. He has a career-high singles ranking of world No. 153 achieved on 22 July 2019. Clarke has won 5 Challenger and 12 Futures titles.
In 2017, on a Wimbledon wildcard, Clarke and Marcus Willis beat the defending doubles champions and second seeds, Nicolas Mahut and Pierre-Hugues Herbert, in the second round, in five sets.