Novak Djokovic crashed out of the Qatar Open in the first round earlier this week and was seen limping through Doha Airport.

Jannik Sinner overpowered Alexander Zverev in a clinical win, while Madison Keys delivered a fearless performance to halt Aryna Sabalenka.

Welcome back to the Monday Tennis Briefing, where will explain the stories behind the stories from the past week on court. This week, one of the strangest head-to-heads in tennis got stranger still; ...