Lauren admits he's quickly been won over by Saka.
Lauren told Gentingbet: "Saka has the potential to be a world-class player. He is a player who understands the game which is so important.
"How many times does he lose the ball during a game? Not many at all. He plays simple. He can play in a variety of different positions and do a great job in all of them.
"I still think he hasn't achieved his full potential. Sometimes for a young player to reach their potential then they need to be surrounded by top players who will make them better. But Saka has all the qualities to be a top, top player."
On Martinelli, he added: "Martinelli is one of the best talents in the Premier League. He was unlucky to get injured last season as he was showing excellent promise. He is quick, he can attack the spaces in the last third.
"He can play in the number nine or wide positions. He is quick in transitions and has lots of pace, as you can see from his goal against Chelsea last year. Hopefully, he can come back strong from his injury and pick back up where he left off.
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