LONDON, July 8 : A year ago Alexander Zverev found himself swallowed up by a dark hole following a shock first round exit from Wimbledon.What a difference 12 months has made for the German.The tortured man who had repeatedly described his existence as being "lonely" and "needing therapy" just 12 months ago was all smiles on Wednesday as he reached the semi-finals at the All England Club for the first time.Breaking into the Grand Slam winner's circle at the 41st attempt, when he won the French Open last month, has finally freed him from his demons and Zverev now stands just two wins away from joining a select group of players to have completed the Roland Garros-Wimbledon double in the same year. If he is to add his name to the list of six men who have achieved the feat in the professional e