Paris Saint-Germain head coach Thomas Tuchel feels more new signings are required at Parc des Princes, who are being linked with Danny Rose.
The Tottenham and England left-back made only 10 Premier League appearances in a 2017-18 campaign that was heavily disrupted by injuries.
Despite his fitness issues, the Spurs defender still managed to make Gareth Southgate's final squad for the World Cup in Russia this summer, although he only managed to start two matches during his country's run to the semi-finals.
Upon his return to club duty, Ben Davies appears to have usurped Rose as the first-choice left-back at Spurs, with Mauricio Pochettino selecting the Wales international in both Premier League games this term.
PSG are reportedly keen on 28-year-old Rose and Tuchel confirmed he wants PSG to add more arrivals after a quiet transfer window that has seen only Thilo Kehrer and Gianluigi Buffon join the club.
"I hope the transfer window is not finished for us," Tuchel told a news conference on Friday. "I trust my managers and my sports director [Antero Henrique].
"I do not comment on the rumours of the transfer window, I can only tell you that three years ago I played Tottenham and Danny Rose [while in charge of Borussia Dortmund] and I wondered for three days how to face him."
Toby Alderweireld and Mousa Dembele have also been linked with leaving Spurs, however, the Premier League's transfer window closed earlier in August, so they could not be replaced.
Reports also indicated earlier this month that PSG were considering a £100 million ($128.8m) bid for Christian Eriksen but Spurs manager Mauricio Pochettino believes his squad will remain intact.
"I expect all the players [to stay]," Pochettino said. "I am working like if all the people are going to be here. I cannot work thinking if they are going to be here tomorrow or not.
"Not only these names, but for different names, an offer can arrive from another club. When an offer arrives maybe tomorrow or this afternoon we are going to consider it.
"After four years here, for me we start from zero, giving the players the opportunity to play and perform. Not thinking about what happened in the past or what is going to happen in the future."
Specifically asked about Rose, an unused substitute in Tottenham's last game - a win against Fulham - Pochettino added: "All players in the squad are going to have the opportunity to play.
"I'm not going to explain my decision. Maybe he plays Monday [at Manchester United], maybe not. You need to wait and see what is going to happen."