Top seed Ons Jabeur advanced to the last 16 at the MUSC Health Women's Open, while Magda Linette was a casualty on Tuesday.
Jabeur – who reached the semi-finals of the Volvo Car Open – made a winning start at the WTA 250 event after toppling Stefanie Vogele 6-4 6-1.
The Tunisian won 88.9 per cent of her first serves to set up a clash with qualifier Alycia Parks – the latter eased past fellow American Grace Min 6-1 6-4.
However, second seed Linette crashed out at the hands of in-form Colombian Maria Camila Osorio Serrano.
@Ons_Jabeur isn't slowing down!
— wta (@WTA) April 13, 2021
The No.1 seed is through to Round 2, where she will face American qualifier Parks.#MUSCHealthWomensOpen pic.twitter.com/1cWvyMQill
Osorio Serrano, who claimed her maiden singles title at the Copa Colsanitas in Bogota last week, upstaged Linette 6-3 4-6 7-5.
Elsewhere, 15-year-old wildcard Linda Fruhvirtova – in just her second WTA main-draw appearance – progressed 6-2 6-7 (7-9) 4-4 after fourth seed Alize Cornet retired in the final set.
Top Headlines
Featured Matches
Football
Arsenal
English Premier League
2-0
Brighton and Hove Albion
Aston Villa
English Premier League
2-0
Chelsea
Fulham
English Premier League
0-1
Newcastle United
Leeds United
English Premier League
2-0
West Bromwich Albion
Leicester City
English Premier League
2-1
Tottenham Hotspur
Manchester City
English Premier League
2-0
Everton
Liverpool
English Premier League
1-0
Crystal Palace
Cricket
Sussex
Sri Lanka
Teams will be announced at the toss
Multan Sul..
Quetta Gla..
Teams will be announced at the toss
Islamabad..
Karachi Ki..
Teams will be announced at the toss
Peshawar Z..
Lahore Qal..
Teams will be announced at the toss
Islamabad..
Quetta Gla..
Teams will be announced at the toss
Lahore Qal..
Islamabad..
Teams will be announced at the toss
Mumbai Ind..
Delhi Capi..
Teams will be announced at the toss