On the eve of Chelsea's opening US Tour 2012 match in Seattle on Wednesday, July 18, Frank Lampard, Branislav Ivanovic, Petr Cech and Romelu Lukaku were joined at training today by a few Seattle Seahawks players where they swapped shirts and sports for a bit of fun.

The July 18 match is part of the World Football Challenge which takes place across North America July 18 through August 11.

Check out the video below as Seahawks linebacker K.J. Wright tells Lamps to 'GO LONG', while Lukaku shows his skills with an American football.

Click to play: