This may occur if: 1  You have a sudden drop in blood pressure. 2  Your body does not have enough water (is dehydrated) because of vomiting, diarrhea, fever, and other conditions. 3  You get up too quickly after sitting or lying down (this is more common in older people).
Wimbledon 2015: Rafael Nadalâs coach says itâs good to talk during play. Toni Nadal feels that coaches are getting a rough deal. Toni Nadal, the coach and uncle of Rafael Nadal, believes it is impossible for a coach not to encourage and communicate generally with a player during a match.
In 2015, after Rafael Nadal lost in the second round at Wimbledon to Dustin Brown, who was ranked No. 102 at the time, former world No. 1 John McEnroe said on BBC Radio 5 Live that the Spanish tennis star should get a new damn coach. Rafael had failed to reach the semifinals at all four Grand Slam events that year.