Katie Boulter's tennis star boyfriend Alex de Minaur warned NOT to 'p*** off' Novak Djokovic ahead of Wimbledon quarter final after Centre Court outburst

Philippoussis, couldn't help smiling as he watched Djokovic, after his win over Holger Rune in Monday's last-16 match, then angrily round on the Dane's fans whom he felt were disrespecting him.