A terrified ball boy at the Shanghai Masters had no idea what was going through Alexander Zverev's mind after the 21-year-old claimed a crucial point over opponent Nicoloz Basilashvili.
An aggressive fist pump from the World No 5 had the young boy rocking back in fear — and it may just be the next great sporting meme.
The fourth-seeded Zverev was also struggling with a cold, but he beat Basilashvili 7-5, 6-4.
Basilashvili arrived in Shanghai after beating del Potro in Beijing to win his second career title.