Katie Boulter comes from set down to beat Marta Kostyuk in San Diego Open final

British No 1 Katie Boulter has claimed her first WTA 500 tournament victory with a 5-7 6-2 6-2 win over Ukrainian Marta Kostyuk in the final of the San Diego Open.

After an even start between the two, the sixth seeded Ukrainian began to get the better of Boulter, stringing multiple games together and rapidly closing in on the opening set.

Boulter fought back to even the set at 5-5, but Kostyuk regained the momentum to wrap up the first set 7-5….