Britain's top-ranked female tennis player, Heather Watson, lost in the first round of the Australian Open. She says it's probably because she had her period and felt like crap.

Get this woman to a couch, immediately. (Getty)

Two other female tennis players were quick to praise Watson, including Annabel Croft on BBC Radio 5, who said discussing periods is "the last taboo in women's sport."

Tara Moore, Britain's number 5 tennis player and a friend of Watson, told The Telegraph she agrees that periods can really affect a woman's performance. In addition to the physical effects, Moore said she has nightmares about getting hers during Wimbledon, where players must wear all white.

Watson felt so ill that she needed to call a doctor.

Sources: h/t BuzzFeed | BBC