- See also: 2006 in sports, 2005 in tennis, 2007 in tennis.
- Australian Open (January 16–January 29)
- Men's Singles: Roger Federer d. Marcos Baghdatis, 5-7, 7-5, 6-0, 6-2.
- Women's Singles: Amélie Mauresmo d. Justine Henin-Hardenne, 6-1, 2-0, Henin-Hardenne retires.
- Men's Doubles: Bob Bryan & Mike Bryan d. Martin Damm & Leander Paes, 4-6, 6-3, 6-4.
- Women's Doubles: Zi Yan & Jie Zheng d. Samantha Stosur & Lisa Raymond, 2-6, 7-6(9-7), 6-3.
- Mixed Doubles: Martina Hingis & Mahesh Bhupathi d. Elena Likhovtseva & Daniel Nestor, 6-3, 6-3.
- French Open (May 28–June 11) - Details
- Men's Singles: Rafael Nadal d. Roger Federer, 1-6, 6-1, 6-4, 7-6(7-4).
- Women's Singles: Justine Henin-Hardenne d. Svetlana Kuznetsova, 6-4, 6-4.
- Men's Doubles: Jonas Björkman & Max Mirnyi d. Bob Bryan & Mike Bryan, 6-7(5-7), 6-4, 7-5.
- Women's Doubles: Lisa Raymond & Samantha Stosur d. Daniela Hantuchova & Ai Sugiyama, 6-3, 6-2.
- Mixed Doubles: Katarina Srebotnik & Nenad Zimonjić d. Elena Likhovtseva & Daniel Nestor, 6-3, 6-4.
- Wimbledon - Details
- Men's Singles: Roger Federer d. Rafael Nadal, 6-0, 7-6(7-5), 6-7(2-7), 6-3.
- Women's Singles: Amélie Mauresmo d. Justine Henin-Hardenne, 2-6, 6-3, 6-4.
- Men's Doubles: Bob Bryan & Mike Bryan† d. Fabrice Santoro & Nenad Zimonjić, 6-3, 4-6, 6-4, 6-2.
- Women's Doubles: Zi Yan & Jie Zheng d. Virginia Ruano Pascual & Paola Suarez, 6-3, 3-6, 6-2.
- Mixed Doubles: Vera Zvonareva & Andy Ram d. Venus Williams & Bob Bryan, 6-3, 6-2.
- U.S. Open
- Men's Singles: Roger Federer d. Andy Roddick, 6-2, 4-6, 7-5, 6-1.
- Women's Singles: Maria Sharapova d. Justine Henin-Hardenne, 6-4, 6-4.
- Men's Doubles: Martin Damm & Leander Paes d. Jonas Björkman & Max Mirnyi, 6-7(5-7), 6-4, 6-3.
- Women's Doubles: Nathalie Dechy & Vera Zvonareva d. Dinara Safina & Katarina Srebotnik, 7-6(7-5), 7-5.
- Mixed Doubles: Martina Navratilova & Bob Bryan d. Kveta Peschke & Martin Damm, 6-2, 6-3.
Main article: 2006 Davis Cup
World Group Draw
- S-Seeded
- U-Unseeded
- *Choice of ground
World Group Playoffs
Date: 22 Sep - 24 Sep
World Group I Draw
- S-Seeded
- U-Unseeded
- *Choice of ground
(May 21–May 27)
- TP: Ties Played
- TW: Ties Won
- MW: Matches Won
- SW: Sets Won
- Tokyo, Japan: Toray Pan Pacific Open, indoor carpet
- Indian Wells, USA: Pacific Life Open, outdoor hardcourt (March 10–March 19)
- Miami, USA: NASDAQ-100 Open, outdoor hardcourt (March 23–April 2)
- Charleston, USA: Family Circle Cup, outdoor clay (April 10–April 16)
- Berlin, Germany: Qatar Total German Open, outdoor clay
- Rome, Italy: Campionati Internazionali d'Italia, outdoor clay
- San Diego, USA: Acura Classic, outdoor hardcourt
- Montréal, Canada: Rogers Cup presented by National Bank, outdoor hardcourt
- Moscow, Russia: Kremlin Cup, indoor supreme
- Zurich, Switzerland: Zurich Open
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