Even the strong-minded championship players go through some bad patch where things don't go their way, 23-time Grand Slam winner Serena Williams also had such bad days where she couldn't control her emotions.
Angry on Double Fault over break of serve
Vents out frustration over umpire's call at US Open
Sobbing in-front of press
Disappointing behavior towards lineswoman
Couldn't control herself during break of serve
Chair umpire bugging Serena Williams
Hostile welcome from the spectators