They give him caffeine shots, which is perfectly legal, of course. And then they sometimes have to give him mild sleeping medication so he can rest properly, that is after hot and cold contrast baths. Every bit of his recovery from time on the court in competition is monitored by his team, which is why Carlos Alcaraz, the tennis player with a comet-like trail in becoming the youngest ever World No 1 at 19 and a Grand Slam winner as a teenager, is considered the Real McCoy of tennis. He was marked out for greatness some years ago but it took him a while to win a tour title. Once he did so last season, he broke through with four titles in the USA and Europe, beating Rafael Nadal and Novak Djokovic in the Madrid Open, before going on to win the U.S. Open title. He is no cyborg, but every inch the modern tennis player with a scientific training programme and on-court coaching with a former world No. 1 in Juan Carlos Ferrero. His trainer says he has a good genetic predisposition towards hard work. Alcaraz himself says, not immodestly, that he deserves respect – “I am 19 years old and I have worked a lot in a very hard way.” He is not going to fade out like other young winners of Grand Slams who broke the monopoly of the trio of all-time greats.