The FA Cup third round gets underway this weekend as every Premier League club enters the competition.
On Friday night, League Two Exeter City forced Liverpool into a lucrative replay at Anfield after twice taking the lead on home soil.
Oxford boss Michael Appleton saluted a "magnificent" performance after Kemar Roofe sent Swansea tumbling out of the FA Cup.
Roofe scored a superb quickfire double as League Two side United stunned their Premier League visitors 3-2 in the first major shock of this season's third round.
Swansea began with a superb Jefferson Montero strike which would have lit up any game, but ended up with a chastening defeat which was compounded by an an alleged altercation between Jonjo Shelvey and some of the travelling supporters.
Appleton said:
Harry Kane came off the bench to salvage a replay for Spurs with minutes remaining in a thrilling FA Cup tie at White Hart Lane
A goal in either half from Diego Costa and Ruben Loftus-Cheek helped Chelsea avoid a potential banana skin against League One opposition
League Two Oxford United have pulled off the shock of round three by dumping out Premier League strugglers Swansea City