Galling is a severe form of wear that occurs when metal surfaces slide against each other under high pressure and friction.

The former men’s world no. 1 defeated world no. 418 Kasidit Samrej in five sets on day three of the Australian Open on Tuesday night. Watch the biggest Aussie sports & the best from overseas ...

However, it seems the sudden fame might have gnawed at the 26-year-old’s patience and was recently caught on video losing his temper in public. In what seems to be an attempt to avoid recognition, ...