British number one and top seed Johanna Konta reached the second round of the Nottingham Open as Heather Watson was knocked out.
Konta, 26, was leading 6-2 3-0 when British number four Tara Moore retired with a foot injury.
World number eight Konta, who has now won 300 singles matches in her career, will play Belgian Yanina Wickmayer in round two.
Watson, 25, lost 6-2 6-3 against fourth seed Alison Riske of the USA.
The British number three's defeat came after she finished runner-up in the Surbiton Trophy on Sunday.
Konta told BBC Radio Nottingham: "I didn't realise I was approaching that number.