Harriet Dart and Dan Evans led the British charge into the Wimbledon second round on a bumper day of matches for home players.
Dart, whose first set was watched by the Duchess of Cambridge on court 14, beat American Christina McHale 4-6 6-4 6-4 in a tight tussle.
British number three Evans had a much more straightforward time in a 6-3 7-6 (7-5) 6-3 win over Federico Delbonis.
Six other Britons are in action on Tuesday, including Johanna Konta.
There are 10 Britons in the singles draws here, four of whom are into the second round after victories for Kyle Edmund and Heather Watson on Monday.