From McEnroe to Medvedev, meltdowns on tennis courts are part of the sport's mental challenge‎

The tennis season is heating up with the French Open underway. In a sport known for its mental challenges, it’s part of the game to see top players lose their cool on court. In recent weeks, Daniil Medvedev and Daniel Altmaier have each had memorable, racket-mangling meltdowns on Europe's clay courts.