Igor Valeryevich Andreev (, BGN/PCGN: Andreyev, ISO 9: Andreev, ; born 14 July 1983) is a Russian former professional tennis player. He won three ATP Tour singles titles, reached the quarterfinals of the 2007 French Open and achieved a career-high singles ranking of world No. 18 in November 2008. Tennis career 2003 Andreev made his ATP debut in September 2003 in Bucharest, Romania as a qualifier and defeated top seed Nikolay Davydenko 7–5, 6–7, 6–0 in the first round, before losing in the next round to José Acasuso. At the Moscow ATP tournament later the same month, Andreev defeated the top seed Sjeng Schalken in straight sets, 6–3, 6–1, and made his first ATP quarterfinal appearance, eventually losing to Paul-Henri Mathieu 6–2, 3–6, 5–7. He entered the St. Petersburg tournament in October 2003 as a wildcard, and defeated fourth seed Max Mirnyi 6–4, 7–6 before losing to Sargis Sargsian in the second round. 2004 Andreev finished in the top 50 of the ATP rankings for the first time in his career. During the same year, he also reached two ATP finals: Gstaad, Switzerland in July (losing to Roger Federer), and Bucharest, Romania in September (losing to José Acasuso). He won a personal best 28 matches in the year, and made his Davis Cup debut. Andreev made his Grand Slam debut at the 2004 Australian Open, where he lost in the first round to France's Olivier Patience, 4–6, 4–6, 7–6(4), 6–1, 6–2. At the French Open, he knocked out defending champion Juan Carlos Ferrero in the second round before losing to eventual champion Gastón Gaudio 6–4, 7–5, 6–3 in the fourth round. He won his first ATP doubles title in Moscow in October 2004 with Nikolay Davydenko, defeating Mahesh Bhupathi and Jonas Björkman 3–6, 6–3, 6–4 in the final. 2005: Three ATP titles Andreev's first ATP singles title came in April 2005 in Valencia, Spain, beating Spaniard David Ferrer 6–3, 5–7, 6–3 in the final after having taken out Rafael Nadal in the quarterfinals. Andreev made the third round at both the French Open and Wimbledon, and reached the quarterfinal at the Pilot Pen Tennis Tournament in New Haven, Connecticut. He then reached the final of the event at Bucharest, losing to Florent Serra 6–3, 6–4. Andreev continued his consistent performance of the year by winning the Palermo event in September 2005, beating Filippo Volandri of Italy 0–6, 6–1, 6–3 in