Paul Vines struck twice in the first 11 minutes to take Tooting & Mitcham into the Ryman League Division One South play-off final.
They ran out comfortable 2-0 winners over Worthing at Imperial Fields, with the visitors being reduced to 10 men after a flare-up involving most of the players in the second half.
Vines struck first after five minutes, showing predatory instincts to bundle the ball over the line after Jon Henry-Hayden had headed Jason Pinnock's right-wing cross goalwards.
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It was 2-0 six minutes later when Allan McLeod crossed from the left and Vines produced a precise header into the corner.
Tooting's early football belied the conditions, with both penalty areas and the centre circle having large puddles caused by heavy rain in the build-up to the match.
Keeper Banks made a fine save to keep out McLeod's free kick, Vines might have had a hat-trick when his smart shot forced the keeper into a save, while Henry-Hayden nearly capped an impressive first half performance with a goal, seeing his header go just wide.
The only blots on the first half performance were a yellow card for Pinnock for something that happened off the ball and Colin Hartburn for a foul.
Although Hartburn saw a long-range effort go just over, Worthing came much more into it after the break with Tooting content to preserve their two goal lead.
But, one scare apart, when Jamie Brotherton struck the top of the bar from close range, they were restricted to long-range efforts that didn't trouble Terrors keeper Dave King.
With both sides becoming increasingly frustrated at a fussy refereeing performance that seemed to take no account of the conditions, Roumald Bouadji and sub Guy Lopez-Dacruz collected yellow cards.
But it was Worthing's fans who were screaming at the ref after Joe Vines' strong challenge led to a flare-up that resulted in Alexander collecting his second yellow card and being dismissed.
Although Tooting were happy to preserve their lead, McLeod, Henry-Hayden and Vines always looked dangerous on the break, but their best openings were invariably halted by an offside flag.
The hard-working Jamie Byatt saw a couple of long-range efforts off target before becoming the fifth Tooting player to be booked for kicking the ball away after the whistle has gone.
At the final whistle, the Terrors players gathered in a huddle to celebrate their place in the play-off final, while Worthing's players went to their supporters knowing their season was over.
Tooting must wait until Thursday night to find out who they will play in the final.
Heavy rain caused the postponement of Cray Wanderers' semi-final with Met Police.
Tooting & Mitcham: King, Hamlin, Hartburn, Bouadji, Joe Vines, Hunt, McLeod, Pinnock, Paul Vines, Henry-Hayden, Byatt. Subs: Hutchings, Francis, Abbey, Green, Lopez-Dacruz.
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