Ivan Lendl joined Sascha Zverev’s team in August this year with immediate results. The young German stunned World #1 Novak Djokovic to win the biggest title of his career, the ATP World Tour Finals at the O2 in London on Sunday.

The 58 year old Czech-American, who retired from playing in 1994 after winning eight major and seven year-ending championships was World #1 for 270 weeks during the 1980s, finishing with 94 singles titles. During his time coaching Britain’s Andy Murray, the Scot won three majors, two Olympic gold medals, an ATP Tour Finals title, (also defeating Novak) and reached World #1 in November 2016.

Ivan signed this drawing for me when he arrived at the O2 on Saturday before Sascha beat Roger Federer in the semifinal.