Tottenham boss Ange Postecoglou says Guglielmo Vicario knows he's being targeted.
The goalkeeper struggled at set-pieces in defeat to Arsenal.
Ahead of facing Chelsea tomorrow, Postecoglou said: "I think he's seen that there's a challenge.
"It's something that even I'm struggling with because I watched the Champions League last night and there was a foul given on the keeper straight away. We're trying to get clarity on it."
Asked if he sees the team progressing, he added: "Absolutely, can see them clearly. 20/20. 100%."