|Australian Open 2017|
|Venue: Melbourne Park, Melbourne Dates: 16-29 January|
|Coverage: Daily live commentary on BBC Radio 5 live sports extra; live text on selected matches on the BBC Sport website; TV highlights on BBC Two and online from 21 January.|
Britain's world number one Gordon Reid begins his Australian Open wheelchair singles title defence against Belgium's Joachim Gerard on Wednesday.
It is a repeat of the 2016 final, which Scotland's Reid, 25, won 7-6 (9-7) 6-4.
Three other Britons are in action, including Alfie Hewett, who makes his Australian Open debut against Stephane Houdet of France, the world number two.
Lucy Shuker faces Marjolein Buis of the Netherlands, while Andy Lapthorne plays against David Wagner.
Reid has reached the semi-finals and final, respectively, of his first two singles events of 2017 - the Sydney Open Super Series and the ITF 2 Melbourne Open.
"I arrive at Melbourne Park in a good place ready to defend my title," said Reid.