Gauff, Raducanu shine in Stuttgart

STUTTGART - World number three Coco Gauff was pushed hard by American compatriot Sachia Vickery before overcoming the qualifier 6-3, 4-6, 7-5 at the WTA Stuttgart clay-court tournament.

The US Open champion needed two hours 27 minutes to silence her second-round opponent, ranked 134th in the world.

Gauff began brightly, rattling off the first three games, but from then on it was to become an error-strewn struggle.

She double-faulted 15 times, enabling Vickery to get 19 break points, of which she converted seven.

Gauff converted six with the most important one coming in the seventh game of the deciding set.

Trailing 0-2, Vickery fought her way back to take a 4-2 lead, with Gauff then clinching the crucial game on her fourth break point.

"She gets a lot of balls back and I was just trying to be patient and also be aggressive. I think I got passive. She played well and I think I did a good job of staying in the match," said Gauff.

Gauff will face the winner of the match between Zheng Qinwen and Marta Kostyuk in the quarter-finals.

Former US Open champion Emma Raducanu defeated three-time Grand Slam winner and former world number one Angelique Kerber 6-2, 6-1 in her first-round match.

At the weekend Raducanu led Britain past France and into the finals of the Billie Jean King Cup in November and she continued that clay-court form in Germany.

Raducanu hit 26 winners to 11 unforced errors while two-time Stuttgart champion Kerber was undone by 29 unforced errors. 

The British player will next face the Czech Republic's Linda Noskova where a win would put her into her second Stuttgart quarter-final.