The 2008 Miami Masters (also known as the Sony Ericsson Open for sponsorship reasons) was a tennis tournament played on outdoor hard courts. It was the 33rd edition of the Miami Masters, and was part of the ATP Masters Series of the 2008 ATP Tour, and of the Tier I Series of the 2008 WTA Tour. Both the men's and the women's events took place at the Tennis Center at Crandon Park in Key Biscayne, Florida, United States, from March 26 through April 6, 2008.
The men's field was headlined by World No. 1 and Masters Cup champion Roger Federer, ATP No. 2 and Chennai finalist Rafael Nadal, and Australian Open champion, Indian Wells Masters winner and defending champion Novak Djokovic. Other top players in the field were 2007 Moscow titlist Nikolay Davydenko, Masters Cup runner-up David Ferrer, Andy Roddick, David Nalbandian and Richard Gasquet.
The women's field was led by World No. 1 and Tour Championships winner Justine Henin, Australian Open runner-up and Indian Wells champion Ana Ivanovic, and Indian Wells finalist Svetlana Kuznetsova. Among other players competing were Australian Open semifinalist and Indian Wells semifinalist Jelena Jankovic, Paris titlist Anna Chakvetadze, Venus Williams, Daniela Hantuchova and Serena Williams.