The Tottenham youngster impressed the after the Hornets after moving him from his accustomed left wing position to an adopted central midfield role.
"We saw a completely different player to the one that had played on the wing. We couldn't have guaranteed him a place in the team in that position either, so that’s why he initially decided to return to Spurs," said Lewington.
Meanwhile, Martin Jol has said Reto Ziegler, who picked up a hamstring injury a fortnight ago, is still 10% away from making a full recovery ahead of Tottenham’s Premiership clash with Portsmouth this weekend.
Left winger Christian Wilhelmsson, who was linked with a move to Spurs last month, is negotiating a new contract with Anderlecht.