Udinese goalkeeper Juan Musso says Romelu Lukaku is "physically devastating" and has been impressed by the Inter striker's partnership with Lautaro Martinez.
The Belgium international joined the Italian side from Manchester United last August and has found his form in Serie A.
Lukaku has netted 18 times in 28 appearances for the Nerazzurri, who sit three points behind Juventus at the summit of the top-flight.
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Inter visit Udinese on Sunday looking to end their run of three draws in a row and Musso is wary of the threat Lukaku poses.