Thomas Mario Haas (German pronunciation: [ˈtɔmi ˈhaːs]; born 3 April 1978) is a German–American former professional tennis player.

Born in Hamburg, Germany to Brigitte and Peter Haas,[2] Tommy started playing his own version of tennis when he was four years old,[3] using a wooden plank to hit balls against the wall or into his father's hands.

He gained attention as a future star when he won his first ATP title in 1999, made it to the semifinals of the Australian Open, and was a finalist in the Grand Slam Cup.

1 ranked players: 3–0 against Andy Roddick, 2–1 against Roger Federer, 2–1 against Marat Safin, and 2–0 against Jim Courier, as well as 5–5 against Pete Sampras.

In 2007, Haas, with his long hair now cut short, had battled his way to his third Australian Open semifinal, which included matches against David Nalbandian and a five-set quarterfinal rematch against Nikolay Davydenko.

He lost his semifinal match against first-time Grand Slam finalist Fernando González from Chile in straight sets.

On 25 February, at the Regions Morgan Keegan Championships in Memphis, Haas stopped Andy Roddick's quest for the final, winning in two sets.

Haas reached the quarterfinals of the Pacific Life Open, an ATP Masters Series tournament held in Indian Wells, California, where he lost to Andy Murray in a third-set tiebreaker.

In the 2007 ATP Champion's Race, Haas, the 13th seed (10th-ranked), not known for being much of a grass court player, advanced to the fourth round at Wimbledon for the first time, defeating Zack Fleishman, Tomáš Zíb, and No.

At the US Open, Haas equaled his best result in New York by reaching the quarterfinals with five-set wins over Sébastien Grosjean and James Blake.

In the hard-court season, he got to the semifinals of the Legg Mason Tennis Classic in Washington, D.C., but lost to Juan Martín del Potro.

At the SAP Open in San Jose, California, he joined forces with Czech Radek Štěpánek to clinch his first doubles title, after losing in the singles quarterfinals to defending champion Andy Roddick.

He did not succeed in defending his quarterfinal points at the BNP Paribas Open in Indian Wells, as he fell to Novak Djokovic in the third round, after defeating Óscar Hernández and Rainer Schüttler.

In the process, he defeated fourth seed Jo-Wilfried Tsonga in the second round, Mischa Zverev in the quarterfinals, and Philipp Kohlschreiber in the semifinals.

[5] This victory made Haas one of a small group of players to have won ATP titles on all three major surfaces (grass, clay, and hard courts.)

Haas continued his late career resurgence by making it to the semifinals at the LA Tennis Open, defeating Marat Safin in the quarterfinals,[6] before losing to Sam Querrey.

He made the third round of the 2010 Australian Open, defeating Simon Greul and Janko Tipsarević, but did not play after February 2010, spending time recovering from right hip and right shoulder surgeries.

As a wildcard at the Gerry Weber Open in Germany, Haas won the title for the second time thanks to wins over former champions Tomáš Berdych and Philipp Kohlschreiber en route to the final,[10] where he defeated world No.

[11] However, Haas was subsequently defeated in the first round of Wimbledon later that month, letting a two-sets-to-one lead slip against compatriot Philipp Kohlschreiber.

In February at the SAP Open he reached his 25th career final against defending champion Milos Raonic, but lost in straight sets.

[17] Next he played in Delray Beach International Tennis Championships as a former 2006 champion, where he lost to Ernests Gulbis in three sets in the semifinals.

[21] Haas beat Mikhail Youzhny in the fourth round but eventually lost to Djokovic in straight sets in the quarter finals.

Haas started the season at the Heineken Open in Auckland, where he lost in the second round against Jack Sock in straight sets.

At the Australian Open, he was forced to retire with a recurring shoulder problem against Guillermo García López in the first round after trailing 5–7, 2–5 on serve.

He teamed up alongside Philipp Kohlschreiber in doubles, taking a four-set victory to hand Germany a place in the quarterfinals for the first time since 2011.

In his next tournament, the Zagreb Indoors, Haas reached the final by defeating Benjamin Becker, Andrey Kuznetsov, and Daniel Evans.

After a later than expected return from injury, in the grass court season in June 2015, Haas played his comeback match at Stuttgart as a wild card.

"I'm thrilled to join the BNP Paribas Open as its new Tournament Director and look forward to working with one of the finest sporting events in the world", said Haas.

I look forward to joining the experienced Indian Wells staff, building upon the foundation they have created, and working to take the event to even greater heights.

In July 2020, Haas played the Berlin tennis exhibitions, where he beat Jan-Lennard Struff before he lost to Dominic Thiem.