British number three Kyle Edmund is through to the second round of the Aegon Open Nottingham after an opening victory over Lukas Rosol.
The world number 68 defeated his Czech opponent, ranked seven places below him, 6-4 6-3 and will next take on Ukrainian fourth seed Alexandr Dolgopolov.
"I'm playing well. I just have to take it one step at a time," he said.
"The tennis calendar is incredibly long, so it's normal to go through ups and downs and you want to keep the ups as long as possible and the downs as short as possible.
"You have to be realistic with what you're doing. I'm working hard and feeling good about my form at the start of this grass court season, so I've got to try and keep it going.
"I've always said grass is probably my least strong surface, so I needed to work on it and I've really bought into that at practice. I've spent a lot of hours on court. It's a different game style on grass, the ball comes to you at a different speed."
The rest of the British contingent in action on Monday did not fare so well as James Ward lost 6-1 3-6 6-4 to Tunisia's Malek Jaziri, Alex Ward went down 7-6 (7/3) 6-7 (3/7) 6-2 to Canada's Frank Dancevic and Brydan Klein was beaten 7-5 6-4 by Frenchman Stephane Robert.
Mikhail Youzhny won an all Russian clash against Teymuraz Gabashvili 4-6 6-3 6-3, Germany's Benjamin Becker beat Australian Jordan Thompson 6-2 2-6 6-4 and Croatia's Ivan Dodig was a 6-2 6-3 victor over Frenchman Julien Benneteau.
There were also wins for Ernesto Escobedo, Victor Estrella Burgos, John Millman, Dudi Sella and Jiri Vesely.
Denis Istomin and Damir Dzumhur were level at a set apiece when their match was suspended due to darkness.