Celtic slump in Philadelphia
French midfielder Sebastien Le Toux scored the game’s only goal in the 23rd minute.
Celtic finished the game with a flourish, having one goal disallowed, then with the last shot of the game a Ben Hutchinson header came back off the crossbar.
New signings Charlie Mulgrew and Joe Ledley both started on the bench for Celtic.
PPL Park, Chester, Philadelphia
CELTIC (4-4-2) Cervi; Hinkel, Loovens, Hooiveld (Mulgrew 45, Rogne 72), Misun; Caddis, Brown (Wilson 45), Crosas (Ledley 45) McCourt (Forrest 61); Rasmussen (Hutchinson 61), McGowan (Sheridan 75)
Not Used: Zaluska,
PHILADELPHIA UNION (4-4-2) Knighton (Perk 45); Harvey, Arrieta, Califf, Orozco; Fred (Stahl 45), Coudet (Noone 45), Miglioranzi (Okugo 45), Torres (Jacobson 43); Mwanga (McInerney 45), Le Toux (Zimmerman 45)
Booked: Harvey 37
Sent-off Stahl 89