Playoff final weekend is one of the most exciting of the entire football calendar.
There's so much at stake for the clubs involved and anything less than a win at Wembley is absolutely heartbreaking.
On Saturday, Newport County and Tranmere Rovers battled it out in north London for a place in League 1, as Connor Jennings 119th minute goal sent Rovers up in the final minute.
On Sunday, Charlton Athletic and Sunderland are playing for a place in the Championship next season.
And things got off to the worst possible start for the Addicks.
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In the fifth minute, they scored a calamitous own goal, as Naby Sarr's simple backpass rolled straight under the foot of goalkeeper Dillon Phillips and into the net.
Check it out below.
That is absolutely shocking. What a nightmare start for Charlton.
With mistakes like that, it's hardly surprising that Sunderland were made favourites ahead of kick-off.
But, half an hour after the defensive howler, Lee Bowyer's side were level.
Slick build-up play led to Lyle Taylor swinging a cross in and Ben Purrington met it at the far post to finish, sending half of a packed Wembley stadium wild.
With the game all square at the time of writing, it's all to play for in the second half for a spot in the second tier next season.
The winners of the Playoff final will be promoted alongside League One champions Luton Town and runners-up Barnsley.
And on Monday, all the attention will turn to an even bigger game - the Championship Playoff final.
This year, it's Aston Villa and Derby County battling it out in one of the most lucrative one-off game in sports.
Along with promotion to the Premier League, the winner will get over £170 million in prize money.
That's three times more than the combined value of winning the Champions League, Premier League and FA Cup.
It's no wonder Playoff final weekend is one of the most eagerly anticipated moments of the football season.
But for Charlton keeper Phillips, it includes a moment he'll want to forget in a hurry.