Leyton Orient 0-1 Gillingham
League Two Gillingham pulled off a surprise win at League One Leyton Orient to progress to round three of the FA Cup.
After a drab first half Curtis Weston gave the Gills the lead when he fired in from 10 yards after Charlie Lee's long throw-in was poorly defended.
Danny Kedwell could have doubled the lead after home keeper Ben Alnwick's sliced clearance.
Lee Cook almost salvaged a replay but smashed against the crossbar.
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Leyton Orient manager Russell Slade told BBC London 94.9:
"I thought it was a game of two halfs - in the first half we didn't play with any energy, or with conviction.
"The second half we were taking the game to them.
"Overall we didn't deserve to go through, probably a draw at best."
Gillingham manager Andy Hessenthaler told BBC Radio Kent:
"I thought we were absolutely exceptional today, pleased with the performance from start to finish.
"I can't ask for any more from them. We did it with a lot of urgency, Curtis has gambled and tucked it away nicely.
"The better team won the game. We earned a bit of luck at the end because of the performance today.