Watch how Ivan Dodig knocked out Marcelo Melo in Miami's double.

Alexander Zverev had almost the job done on this rally against Frances Tiafoe and just had to conclude with an easy smash. But...

Murray, Thiem, Goffin, Firtz or Herbert try the Gong Challenge in London (ATP Finals/Masters).

Renzo Olivo loses his grip on a serve but still wins the point against Thomaz Bellucci in Santiago.

Ryan Harrison traps Grigor Dimitrov's interview with the complicity of the interviewer in London (ATP Finals - Masters).

Grigor Dimitrov Serve Challenge. The Bulgarian try to serve in the box blindfolded. It doesn't seems that hard in the end.