During the half-time interval of the Premier League game between Tottenham and Norwich at White Hart Lane on Boxing Day, Roberts said: "A word on Dele Alli too, because he's nutmegged about three players today, and looks a million dollars."
Alli started the match in North London on Saturday afternoon and played for 79 minutes, as Spurs registered a comfortable 3-0 win.
The 19-year-old midfielder took four shots, had a pass accuracy of 79%, created two chances, put in one cross, attempted four dribbles, won 67% of his tackles, and made two interceptions.
In 16 Premier League appearances so far this season, the England international has scored four goals and created 19 chances.
Alli has a pass accuracy of 76% and a shot accuracy of 67%, and has won 14 headers, 13 dribbles and 28 tackles.
Tottenham are fourth in the Premier League table at the moment with 32 points from 18 matches, just six points behind leaders Leicester City.
The North London outfit will take on Watford away from home at Vicarage Road in the league on Monday afternoon.