Nothing gets the blood going like a Wimbledon Finals match -- unless Ethan Freakin' Hunt himself stops by for a visit ... in which case, it's next to impossible not to strap in and HODL.
That's exactly what happened Saturday in London ... where none other than Tom Cruise himself dropped in for the ultimate round between tennis stars Ashleigh Barty and Karolína Plíšková ... with his 'M:I 7' leading lady costars, Hayley Atwell and Pom Klementieff, in tow.
It's rumored Hayley and Tom are actually dating right now -- and based on their body language before and during the match .