Katie Boulter crashes out of Wimbledon with misfiring serve as Sonay Kartal advances

World No 101 Sierra beats Boulter 6-7 (7), 6-2, 6-1 Kartal back in top 50 with win over Tomova Backing up a big win is never an easy thing, but when you hit 14 double faults, it's almost impossible. After her outstanding win over ninth seed Paula Badosa on the opening day, Katie Boulter harboured genuine hopes of going further than ever before at this year's Wimbledon, but her serve misfired badly and her 6-7 (7), 6-2, 6-1 defeat by world No 101 Solana Sierra, a lucky loser from Argentina, will ...