ohanna Konta into quarter-finals after beating Petra Kvitova

Konta found it difficult to serve the match out – unable to claim victory when she had a match point at 5-2 in the final set, going on to lose the game.

She had reached the brink of victory after winning five games in a row, and was more assured in her next service game, clinching the final set 6-4.

She is the final British player left in the singles.Konta – seeded 19 – reached the same stage two years ago, but went out in the second round last year.