Academy: Watford 2-3 Stevenage
The young Hornets took a two-goal lead with a brace from the in-form Alex Jakubiak before goals from Jimmy Hartley and George Casey levelled the scores up.
Harold Joseph headed home in injury time to hand Stevenage the win and push Watford down to sixth in the Youth Alliance South East Conference.
Watford's opener came from a swift counter-attacking move, Jazzi Barnum-Bobb and Ryan Hope making progress down the flank before sending in a cross for Jakubiak to head past the 'Boro 'keeper.
After the break, subsitute Kurtis Cumberbatch released Jakubiak and the forward drilled home to double Watford's advantage.
Stevenage got one back when they countered effectively, Hartley shooting past Dan Wilks with the aide of deflection from Harry Kyprianou.
With 15 minutes remaining, Casey equalised, sweeping home from the left.
In injury-time, Stevenage stole all three points as Joseph headed in from a corner to win an action-packed clash.
Watford: Wilks; Young, Hall, Doherty (Martin 86); Barnum-Bobb, Hope (c), Westlake (Rosenthal 46), Dillon (Cumberbatch 46), Kyprianou; Lewis & Jakubiak.
Table (top six):
1. Col U P5, W5, +12, PTS 15
2. Luton P4, W4, +7, PTS 12
3. P'boro P5, W3, +7, PTS 10
4. P'mouth P5, W3, +4, PTS 10
5. Wimb'don P5, W3, +3, PTS 10
6. Watford P5, W3, +7, PTS 9
Watford travel to Luton next Saturday.