Thursday 1 March 2018 11:46, UK
Joseph Parker will have it all to do when he goes up against the might of Anthony Joshua at the end of March.
The New Zealander is in Las Vegas to prepare for the world heavyweight title unifier, live on Sky Sports Box Office, and a few friendly faces were in town to check out his training.
England's Rugby Sevens team are in Vegas for this weekend's USA Sevens Tournament, live on Sky Sports, and were impressed with Parker's methods.
Being treated inside Parker's gym, England star Tom Mitchell was keeping quiet when asked who would win the showdown at the Principality Stadium in Cardiff on March 31.
Boxing promoter Bob Arum also popped in to see how Parker's preparations were going - and he certainly wasn't sitting on the fence when it came to a prediction.
Click on the video above to see what happened when England's players met Parker.
Watch the Anthony Joshua vs Joseph Parker world heavyweight title unification fight, from Principality Stadium, Cardiff, on March 31, live and exclusive on Sky Sports Box Office.
