Briton Jack Draper once viewed himself as a Ferrari with reliability issues but the world number six said on Wednesday his hard work away from the court has given him the engine to cope with the physical demands of the Grand Slams.

Jack Draper fights back from a set down to come through a tricky encounter with Alexei Popyrin and reach the quarter-finals at Queen's.

Draper defeated Popyrin in a two-hour, three-set battle of attrition to reach the quarter-finals, 3-6, 6-2, 7-6(5)