Agnieszka Radwanska avoided becoming the second of the top three women’s seeds to lose at Wimbledon on Thursday, beating Croatia’s Ana Konjuh 6-2 4-6 9-7 after her opponent took a tumble and needed treatment in the penultimate game. Konjuh, ranked 103rd in the world, had three match points herself but, with the contest poised at 7-7 and 40-15 on Radwanska’s serve, the Croat stepped on a ball she was chasing and rolled her right ankle, collapsing at the chairs in tears. Konjuh played on, heavily strapped, but with her movement limited, the third-seeded Pole held her nerve to claim the victory after being booed by a section of the crowd for playing a drop shot to bring up her second match point.