Postpublished at 15:59 British Summer Time 17 June
Jonathan Jurejko
BBC Sport at Queen's Club
After their practice set was cut short, there was a little time for Murray and Alcaraz to have a side-helping of fun with the serious business of professional tennis.
The pair lined up side-by-side on the baseline, practising their serves and aiming at empty cans positioned as targets.
Alcaraz wiped a couple out, before taking a seat and intently watching Murray do his thing.
The 21-year-old Spaniard even looked to be filming - a sign of his admiration for his fellow three-time major champion.
When Murray pinged one of the aluminium cans, Alcaraz turned into coach and motivator.
"That's much better!" he smiled with Murray grinning back in return.