Calm down boys, it's because they weren't the correct colour for the strict club - the All England Club - which hosts the biggest tennis tournament of the year.
The club say all players in Wimbledon must wear all-white gear.
But naughty Anna was wearing black! So she had to borrow another pair from her coach.
Anna is ranked 54 in the world and plays against fellow Russian Tatiana Panova in her first round match of the tournament.
Agassi to start