Question: Marc Polmans, with Andrew Whittington, reached the semi-final of a tennis tournament where who were the defending champions?
Sentence (from "Marc Polmans"): Polmans won the 2015 Australian Open – Boys' Doubles title with fellow Australian Jake Delaney, defeating Hubert Hurkacz and Alex Molčan in the final, 0–6, 6–2, [10–8].
Relevant evidence: No