Serbia’s Nenad Zimonjic and Poland’s Marcin Matkowski advanced to the doubles quarterinals at the Queens Club in London by beating the Swiss-Bulgarian duo of Stanislas Wawrinka and Grigor Dimitrov 7-6 (7-5), 7-6 (7-3) late on Wednesday.

Second seeds Zimonjic and Matkowski will next face Sam Querrey and John Isner of the US.