Have you ever seen this? Monfils challenges own good serve - BBC Sport

BBC Sport
Have you ever seen this? Monfils challenges own good serve
BBC Sport
Watch as Gael Monfils challenges his own serve, which was called in, against fellow Frenchman Richard Gasquet on day one of Wimbledon. WATCH MORE: What a guy! Federer gives headband to lucky fan. Available to UK users only. Share ...