Sharapova, Halep win openers26 October 2015 BBC Online
Maria Sharapova and Simona Halep won the opening Red Group matches as the WTA Finals got under way in Singapore.
Halep, the top seed and world number two, thrashed US Open champion Flavia Pennetta 6-0 6-3, before Sharapova saw off Agnieszka Radwanska 4-6 6-3 6-4.
The eight-player season finale begins with two round-robin groups, the top two from each qualifying for the semis.
World number one Serena Williams is absent as she recovers from injury.
The White Group consists of Spain's Garbine Muguruza, Petra Kvitova and Lucie Safarova of the Czech Republic, and Germany's Angelique Kerber.
Halep wins in 72 minutes
Romania's Halep reeled off the first seven games on her way to beating Pennetta in just 72 minutes and taking control of the Red Group.
Halep, last year's runner-up, showed no sign of the ankle injury that hampered her earlier this month.