The recent Sir Matt Busby Player of the Year winner was substituted in the closing stages at Optus Stadium and replaced by young midfielder James Garner, who went on to score his first goal in senior football with an impressive long-range strike that fizzed into the bottom corner.
Ole Gunnar Solskjaer admitted after the victory that Shaw had felt some tightness in his hamstring, but the defender was pictured training with the rest of the United squad at The WACA base on Monday.
The boss may provide an update on Luke’s availability in his next press conference, which will be held at around 03:00 BST on Tuesday (10:00 local time in Australia).