France’s Tiafoe has left everyone amazed as he ended Nadal’s 22-match Grand Slam-winning streak on Monday and reached the US Open quarterfinals for the first time.

What meant the most to Tiafoe about his 6-4, 4-6, 6-4, 6-3 victory over No. 2 seed Nadal in the fourth round at Flushing Meadows, though, was looking up in his Arthur Ashe Stadium guest box and knowing his parents, Constant and Alphina, were there. He served better than Nadal. More surprisingly, he returned better too. And he kept his cool, remained in the moment and never let the stakes or the opponent get to him. Nadal, 36, from Spain, had won both of their previous matches — and every set they played too.