Caroline Wozniacki has hit out at security at the Miami Open after members of her family were abused during her defeat to Monica Puig.
Reigning Olympic champion Puig, who is from Puerto Rico, came back from a set down to win 0-6 6-4 6-4.
But world No 2 Wozniacki was far from happy with the manner in which her family members were treated by some of Puig's supporters and has urged the tournament's organisers to step up their security efforts.
Wozniacki wrote on Twitter: "Last night I lost a tough match to a great opponent and friend Monica Puig at the Miami Open. I am fully aware that tennis is a game of wins and losses.
"However, during the match last night people in the crowd threatened my family, wished death upon my Mom and Dad, called me names that I can't repeat here and told my fiance's niece and nephew (who are 10 years old) to sit down and shut up.
"Meanwhile, security and staff did nothing to prevent this and even accepted this to take place.
"While I always encourage fans to cheer on their favourite player, and I thrive on a challenging atmosphere, when certain lines are crossed, it makes tennis miserable for both competitors.
"I hope the Miami Open chooses to take this seriously because it is a horrible example to set for the next generation of tennis players and fans.
"I wish Monica all the best for the rest of the tournament."
