When in tennis the bell tolls, the heart beats, sweat glistens on the serving arm and legs hurt, the men are separated from the boys. A player for these big moments is Juan-Martin Del Potro (photo). The Argentinian now stands in the semi-finals after a hard battle against the Spaniard Roberto Bautista Agut, the tournament’s number 6 against number 4. «A crazy match», said star photographer Kurt Schorrer. After three thrilling sets, only two points (76:74) separated the two opponents. One detail stands out: «Delpo» served eight aces; the Iberian not a single one. The South American is happy in the semi-final, having enjoyed a run of 17:3 wins since the US Open, including the 20th ATP career title in Stockholm. In New York he not only defeated Roger Federer, but turned around his match against the Austrian Dominic Thiem at two sets to love down. In the critical moment he emptied almost the entire contents of his stomach, then staved off two match balls before going on to win the five-setter. Del Potro has London in his sights, so he is not here in Basel just for fun.