Canadian seed Milos Raonic has sent an injury-troubled Nick Kyrgios packing from the Australian Open in their first-round clash on Melbourne Arena.

Kyrgios looked to be heading towards a retirement, requiring treatment on his right knee after each set, telling the trainer he felt like “absolute dogs**t”.

The 23-year-old soldiered on before losing 6-4 7-6 (7-5) 6-4 in one hour and 56 minutes; his first opening round loss at Melbourne Park.