Mirra Andreeva refuses to shake umpire’s hand after Madison Keys loss

• Teenager hit with point penalty for throwing racket
• Keys into quarter-finals after 3-6, 7-6 (4), 6-2 win

Teenager Mirra Andreeva was given a point penalty for throwing her racket and then refused to shake the umpire's hand in her fourth-round loss to Madison Keys at Wimbledon on Monday.

The 16-year-old Russian, who has been a crowd favourite on her debut at the All England Club, looked on course to becoming the youngest player since Anna Kournikova in 1997 to make the quarter-finals when she led by a set and 4-1. But Keys fought back and Andreeva was given her first warning by the umpire, Louise Azemar Engzell, after flinging her racket across the grass when she lost the second set tie-break.