Lacko 6-7(5) 7-5 6-4 3-2 Raonic*

You have to feel for Milos Raonic. His career, which was on such an upward trajectory in 2016 when he very nearly beat Andy Murray in the Australian Open semi-final before reaching his maiden major final at Wimbledon later in the year, has stalled of late due to a combination of leg and wrist injuries. 

An opening-round loss to Alex de Minaur in Brisbane saw him arrive in Melbourne looking for a first win of 2018, and now he’s in a spot of bother against Lukas Lacko, one set from bowing out.