Former World Number One American tennis player Stan Smith was a special guest at last years World Tour Finals at London’s 02 because Group A was named after him in honour of his victory in the inaugural 1970 year-end Grand Prix in Tokyo.

Stan won two Grand Slams, The US Open in 1971 and Wimbledon the following year. He also formed a formidable doubles combination with Bob Lutz, winning five Grand Slam titles.

While I was waiting at the players’ entrance at the O2, I saw Stan arrive. I literally had less than three minutes to sketch this drawing of him, based on an enlarged image on the wall in the fan zone. By the time he reached me I managed to get this much done, which he signed for me before he went in to watch the day’s proceedings.