KATIE BOULTER has set her sights on pushing further up the rankings after winning the biggest title of her career.

The British number one defeated five top-40 players to win the San Diego Open, bringing her a first WTA 500 trophy and elevating her ranking to 27.

With Cameron Norrie slipping to 28, it means Boulter is the highest-ranked British singles player of either sex heading into Indian Wells, which begins on Wednesday.