Boxer Luke Campbell had to keep his guard up when he faced seven-year-old Jack Polson in the ring today.
And as these pictures show, young Jack tested the Olympic champ with a mean left hook.
Jack sparred with Luke at an open-air training session in Hull city centre on Saturday afternoon.
Tommy Coyle and Kell Brook joined in the fun in Queen Victoria Square to promote their boxing extravaganza at MS3 Craven Park on July 13 - when Luke will make his professional debut.
The boxers met fans and took part in a public workout in a specially constructed ring.
Luke said: "It was great, it was great to interact with the crowd and great to get the kids in the ring with me, hopefully some of them can be where I am in a few years."
Earlier, in a press conference to promote the Craven Park 'Homecoming' show, Coyle went nose-to-nose with Derry Matthews - who he will fight on the night for the Commonwealth lightweight title. Watch a video clip of them squaring up here.
Tickets for 'The Homecoming' are on sale, priced from £25. Visit the Hull KR website for further details.
