Hans "Hanne" Nüsslein (; 31 March 1910 – 28 June 1991) was a German tennis player and coach and former World professional number 1 tennis player who won four professional Majors singles titles during his career. Biography Nüsslein was born in Nuremberg on 31 March 1910. In his youth, he played football, handball and tennis at the 1. FC Nürnberg. After finishing school he apprenticed as a mechanic. At age 16, he gave tennis lessons to other club members for which he was paid a small amount. After a member of a neighboring club reported this to the German Tennis Federation, Nüsslein received a lifetime ban from amateur competition, preventing him from competing at Grand Slam tournaments. Nüsslein then decided to work as a professional tennis coach. On 1 April 1928, he passed the qualifying examination and became a member of the German federation of tennis coaches. He then was hired by the Deutsche Bank in order to give lessons to their executives. Professional career 1929 Beside his coaching work, Nüsslein pursued a career on the emerging professional tennis tournaments. In 1929, he finished in third place in the concluding round robin at the German Pro tennis championships. His win was against Hermann Richter. 1930 In January 1930, Nüsslein reached the quarter finals of the Bristol Cup, beating Edmund Burke before losing to Robert Ramillon. At the French Pro championships at Roland Garros, Nüsslein reached the quarter finals before losing to Roman Najuch. He placed second in the German Pro championships to Plaa and also won his first international pro tournament: Beaulieu-sur-Mer on the French Riviera. 1931 In 1931, Nüsslein won the German Pro Championships over Roman Najuch. He played tennis against legend Bill Tilden in Europe, taking him to 5 sets in Hamburg. Tilden who had never heard of Nüsslein before the match ("Who is Nusslein?") was surprised by the German's performance and invited him to play in his United States pro tour. 1932 In 1932 Nüsslein and Tilden played the World tour in the United States. Tilden won comfortably. Nüsslein lost in the final of the U. S. Pro in Chicago to Karel Kozeluh in straight sets in July. "Long rallies, which frequently sent the score back to deuce, were the outstanding features of the match with Kozeluh, by reason of greater steadiness, scoring many points on these occasions. Both players showed a desire to hug the base