Ernests Gulbis is a Latvian professional tennis player. In 2008, Gulbis won his first ATP Tour doubles title at the U.S. Men's Clay Court Championships, teaming with Rainer Schüttler, and in 2010 won his first ATP Tour singles title in the Delray Beach, defeating Ivo Karlovic in the final. In total, Gulbis has 6 ATP titles to his name. His best performance at a Grand Slam is reaching the semifinals of the 2014 French Open. He had previously reached the quarterfinals of the 2008 French Open. Gulbis' career-high singles ranking is World No. 10, making him the only Latvian tennis player ever to be ranked inside the top 10 in ATP Singles Ranking. He achieved this in June 2014.