It looked like Alexander Zverev was ready to become a real Grand Slam contender at the end of 2018 when he won the Year End ATP Finals. But unfortunately things haven't turned out that way this year and yesterday was another step in the wrong direction with him reporting that his confidence is at an all-time low. In this 'Mental Toughness Made Simple' video I discuss what confidence is and how best to develop it. Have a great day :-)