Match ends, Colchester United 0, Oxford City 1.
Matt Paterson's second-half header gave National League South side Oxford City a shock FA Cup first round victory at Colchester United.
Paterson's winner came right at the start of the second half as he headed in David Pearce's cross.
City are into round two for only the second time in their history.
Tom Eastman struck the crossbar for the hosts in the first half while Paterson hit the woodwork with a free-kick at the other end.
Colchester, who once produced a giant-killing themselves by knocking out the then mighty Leeds United in the fifth round in 1971, are 56 places above City in the football pyramid.
They had chances to level matters with Kyel Reid's deflected free-kick from the edge of the area flashing inches wide and keeper Jack Stevens denying substitute Craig Slater.
Lewis Kinsella also went close but City held on.
Colchester United manager John McGreal told BBC Essex:
"We've picked a team that won last week against Crewe. Players that were looking to try and score goals.
"We've just been looking at some of the decisions in and around their attacking third, slashing at things, snatching at things.
"Take nothing away from Oxford, they were excellent on the day and deserved to go through."
Oxford City boss Mark Jones told BBC Radio Oxford:
"Sometimes you just can't make up the script. Tremendous credit goes to the players today for the way they stuck at it. I'm delighted for them.
"We have struggled a bit so far this season but today is just a fantastic day for the club.
"It's only the second time the club have ever reached the second round so these players can go down in the history of the club."
- 6KentSubstituted forKinsellaat 59'minutes
- 8LoftSubstituted forSlaterat 57'minutes
- 14ComleySubstituted forO'Sullivanat 80'minutes
- 3GrantBooked at 51mins
- 7McEachranSubstituted forHirstat 80'minutes
- 9PatersonSubstituted forFordeat 90+3'minutes
- Alan Young
- Shots on Target
Second Half ends, Colchester United 0, Oxford City 1.
Hand ball by Tom Eastman (Colchester United).
Foul by Kyel Reid (Colchester United).
Godfrey Poku (Oxford City) wins a free kick in the defensive half.
Attempt blocked. Brandon Hanlan (Colchester United) right footed shot from the centre of the box is blocked.
Substitution, Oxford City. Erza Forde replaces Matt Paterson.
Foul by Tommy O'Sullivan (Colchester United).
Freddie Grant (Oxford City) wins a free kick in the attacking half.
Attempt missed. Rob Sinclair (Oxford City) left footed shot from the right side of the box is close, but misses to the left following a fast break.
Corner, Colchester United. Conceded by Joe Oastler.
Corner, Colchester United. Conceded by Godfrey Poku.
Attempt blocked. Drey Wright (Colchester United) right footed shot from outside the box is blocked.
Attempt missed. Kyel Reid (Colchester United) left footed shot from the left side of the box is close, but misses to the right.
Attempt saved. Mikael Mandron (Colchester United) header from the centre of the box is saved in the centre of the goal.
Attempt saved. Brandon Hanlan (Colchester United) right footed shot from the centre of the box is saved in the centre of the goal.
Corner, Colchester United. Conceded by Freddie Grant.
Attempt missed. Tommy O'Sullivan (Colchester United) right footed shot from outside the box misses to the left.
Substitution, Colchester United. Tommy O'Sullivan replaces Brandon Comley.
Substitution, Oxford City. Horatio Hirst replaces Zac McEachran.