Ed Woodward has been pictured at Manchester United's offices in London as he races to get deals over the line.
United are still hopeful of completing at least two transfers before the window closes on August 8.
United remain in talks with Juventus over a swap deal for Paulo Dybala, which would see Romelu Lukaku move in the opposite direction.
Dybala is yet to be convinced over a summer move to Old Trafford but United and Juventus are both keen to strike an agreement.
Juventus chief Fabio Paratici is in London and is set to speak to Woodward.
It remains to be seen if the United chief can convince Dybala to make the move to Old Trafford.
He is said to primarily be concerned about United's failure to qualify for the Champions League last season, with Ole Gunnar Solskjaer's men ending the campaign in sixth.
Reports in France suggest there is another reason behind Dybala's resistance to agree the deal.
Le10Sport claims there is still a possibility PSG could make a move for the Argentine before the end of the transfer window.
United are also hopeful of reaching an agreement with Leicester for defender Harry Maguire.
The Red Devils have returned with a £70m bid for Maguire, although Leicester are continuing to hold out for closer to £90m.
Maguire has been left out of Leicester's pre-season friendly with Atalanta as the transfer speculation continues.
United could also look to bring in a central midfielder this summer with Sean Longstaff and Bruno Fernandes targets.
