PSG star Kylian Mbappe has acknowledged that the Ligue 1 giants need to strengthen if they are to break their Champions League hoodoo.The French side made it to the final last season only to be beaten 1-0 by Bundesliga side Bayern Munich.They have lost the likes of Thiago Silva, Edinson Silva and Thomas Meunier this summer with their only signings being Mauro Icardi and Sergio Rico, who joined on permanent deals after spending last season at the club on loan.And Mbappe is hoping for some more recruits ahead of the return of the Champions League group stages next month."Of course I am optimistic that we will win the Champions League,” Mbappe told Telefoot. “We have to because, if we don't believe it, no one is going to believe it for.
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