Maresca, however, was cautious about his goalkeeper options after an offer for AC Milan No1 Mike Maignan was rejected last week.
In anticipation of tonight's world cup opener, he said: “Jadon is not with us. So that is certainly a position that we probably have to do something.
“Also because Misha (Mudryk) is not with us. At the moment we have Noni (Madueke), Pedro (Neto) and Ty (George) as the right wing players. So something will certainly happen.”
In the meantime, asked about their attempt for Maignan, Maresca also said: “Robert (Sanchez) is the number one, we have Filip (Jorgensen) as number two.
“(Mike) Penders will add us to us in the coming weeks to analyze, assess and make a final decision. For Maanignan or different players I don't think it's worth talking about them.”