The former Tottenham defender believes that Lamela, who can play as a winger or as an attacking midfielder, has become a man now.
Roberts has also urged Tottenham attacking midfielder Christian Eriksen to do his best to ensure that the team finish second in the Premier League this season.
The North London outfit’s chances of winning the league title are over, and they are just three points above bitter rivals Arsenal, who are currently third in the standings.
@ChrisEriksen8 great pass last night Christian one last win please to come above gooners well done on a great season— Graham Roberts (@GrahamRoberts4) May 3, 2016
Lamela is having a truly brilliant season and has been one of the best players for Tottenham.
The Argentina international has scored four goals and created 68 chances in 32 Premier League appearances for Spurs.
The former AS Roma star has a pass accuracy of 78% and a shot accuracy of 53%, and has won 10 headers, 34 dribbles and 47 tackles.
Meanwhile, Eriksen has scored six goals and created 109 chances in 33 Premier League matches for Spurs this campaign.