Top seeds Wesley Koolhof and Kevin Krawietz kicked off their BMW Open campaign on Wednesday with a victory against Marcelo Melo and Mischa Zverev, 6-3, 6-3.
Munich marks the first tournament together for the Dutch-German team. Koolhof reached three quarter-finals this year with Lukasz Kubot, while Krawietz partnered with Horia Tecau to reach a final in Rotterdam and posted a semi-final run in Dubai with Jan-Lennard Struff.
Koolhof and Krawietz won 100 per cent (18/18) of points behind their first serves and didn’t face a break point en route to victory in an hour and three minutes. The top seeds will next face Matthew Ebden and John-Patrick Smith in the quarter-finals. The Aussie duo needed two tie-breaks to defeat Tomislav Brkic and Nikola Cacic 7-6(3), 7-6(5).
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Also in action, German pair Yannick Hanfmann and Dominik Koepfer upset fourth seeds Marcus Daniell and Philipp Oswald 7-6(1), 6-4 to reach the semi-finals. Sander Gille and Joran Vliegen received a walkover from Federico Coria and Guido Pella to join them in the last four.
Second Seeds Reach Estoril Quarter-finals
Second seeds Raven Klaasen and Ben McLachlan are into their third quarter-final of the year after taking down Simone Bolelli and Maximo Gonzalez at the Millennium Estoril Open.
Klaasen and McLachlan saved all four break points they faced as they closed out the 6-2, 6-3 victory in 62 minutes. The victory also avenges the South African-Japanese duo’s defeat in the Santiago semi-finals, where Bolelli and Gonzalez won 6-4, 6-4 en route to the title.
The second seeds will face the all-American team of Nicholas Monroe and Frances Tiafoe in the quarter-finals.
Elsewhere in Estoril, Luke Bambridge and Dominic Inglot are into the semi-finals after upsetting third seeds Austin Krajicek and Oliver Marach 7-6(2), 6-4. They are joined by Hugo Nys and Tim Puetz, who took down Marcelo Demoliner and Santiago Gonzalez 7-6(3), 6-1 to advance.