Pakistan, March 6 -- 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 gender heading into the BNP Paribas Open in Indian Wells, which begins on Wednesday.

The same week a year ago, Boulter was ranked outside the world's top 150, and she does not have many points to defend until the grass-court tournament in Nottingham in June, where last year she picked up her first WTA title.

"I feel like I've started the year very wel...