Watch: Grigor Dimitrov comes close to a head injury while diving in pool

Grigor Dimitrov came dangerous close to banging his head into the side of a shallow pool while on vacation this week. The 23-year-old, who made his first Slam semifinal last week at Wimbledon, is on a well-earned vacation with girlfriend Maria Sharapova. He posted a video of himself jumping into a pool, poking fun of his numerous hard falls on the grass at Wimbledon, and he's lucky it was indeed a "soft landing."

That was a little too close for comfort. Dimitrov's hard-charging coach Roger Rasheed saw the video and didn't sound too pleased that his charge was getting a little bit reckless with his body.

If you're a tennis player taking a much deserved and necessary post-Wimbledon vacation, here are the rules:

Rule No. 1: Have fun. 

Rule No. 2: Don't get hurt. 

Rule No. 3: Don't let your coach know you almost got hurt. 

Two out of three ain't bad, Grigor. 

WERTHEIM: Dimitrov continues to show his potential to be one of tennis' best