This was the best response to the journalist possible.
The British press were clearly baiting him into lavishing praise over Greenwood, since he's one of our own, going so far as to tempting Ralf to compare him to Haaland. The answer was perfect. Mason does have the physical side to develop. Stamina levels, fitness levels to engage in a heavy press for longer periods of time; even help work on his acceleration a bit. By not being drawn into unilateral praise for him, and by stating that he's the kind of player who can "become a regular in the team", he's given Mason motivation to improve and work his ass off to get there.