Kerber makes strong start at WTA Eastbourne

"It's nice being back here, having another good match on grass before Wimbledon," said Kerber."That's why I'm here. I like to play here on grass, so I try to enjoy every match and every moment right now."

Bertens was also in commanding form as the number three seed saw off Yulia Putintseva 6-4, 6-1.

Defending champion Caroline Wozniacki was another to win in straight sets, beating Andrea Petkovic 6-4, 6-4 to set up a rematch of last year's final against Aryna Sabalenka.