Las Vegas, NV (SportsNetwork.com) - Keith Thurman won a unanimous 12-round decision over Robert Guerrero on Saturday night to retain his WBA world welterweight title.

The 26-year-old Thurman (25-0) knocked Guerrero (32-3-1) down in the ninth round and easily won the decision over the 31-year-old at MGM Grand.

The scorecards were 120-107, 118-108 and 118-109 in his favor.