Swansea are the clear favourites to go through, and should they do so they will become just the second winners we've had all season in ten rounds of the competition, emulating Warrington Town who beat Bamber Bridge in the Second Round Qualifying.
Swansea beat our previous team Colchester in the last round by a comfortable 4-0 scoreline whilst Leyton Orient, who had previously beaten Dagenham & Redbridge and Droylsden , were surprise 1-0 winners at Norwich in the third round with a goal from Jimmy Smith who had enjoyed a loan with Norwich three seasons ago.
It was their second round replay that will be one they remember at the end of this cup run. Having drawn 1-1 at Droylsden they were 2-1 down in the replay at home with just a minute to go with both teams having had a player sent off.
They scrambled an equaliser to take it into extra time. Both teams had another player sent off but incredibly Leyton Orient scored six goals in the extra thirty minutes to win that tie against Norwich.
Swansea are favourites, but with the Clarets Mad record I wouldn't bet against Leyton Orient pulling off another shock win.