Marc Polmans, with Andrew Whittington, reached the semi-final of a tennis tournament where who were the defending champions?
2017 Australian Open – Men's Doubles Jamie Murray and Bruno Soares were the defending champions, but lost in the first round to Sam Querrey and Donald Young.
2017 ATP World Tour The 2017 ATP World Tour is the global elite men's professional tennis circuit organized by the Association of Tennis Professionals (ATP) for the 2017 tennis season. The 2017 ATP World Tour calendar comprises the Grand Slam tournaments (supervised by the International Tennis Federation (ITF)), the ATP World Tour Masters 1000s, the ATP World Tour 500 series, the ATP World Tour 250 series, the ATP Finals, and the Davis Cup (organized by the ITF). Also included in the 2017 calendar is the Hopman Cup, which is organized by the ITF and does not distribute ranking points.