Feyenoord's number one striker is indeed Ayase Ueda, and his departure could be a significant blow to the team's chances of winning the championship and competing in European competitions. Kenneth Perez and Karim El Ahmadi, two of the team's officials, have expressed doubts about Feyenoord's ability to find a suitable replacement for Ueda. Perez is unsure who will take Ueda's place, while El Ahmadi believes that the team's attack will suffer as a result of Ueda's departure.

Feyenoord has been preparing for Ueda's potential departure during the pre-season, suggesting that the team was aware of the possibility of his exit. However, the team's officials are still unsure about who will take over as the first striker. Nacho Ferri, a player who was recently signed by Feyenoord, is not likely to be the team's first choice in this position, according to El Ahmadi.

Feyenoord will now have to find a suitable replacement for Ueda, who is on his way to Lille. The team's management will have to act quickly to address this issue and ensure that the team's attacking options are not compromised.