The visitors made a bright start however and had the first opening on eight minutes when Paris Simmons turned away from Troy Archibald-Henville. Only some good defending from Ricardo Rocha prevented Henrik Ojamaa being left with a tap-in.
Five minutes later, Greg Mills this time got the better of Archibald-Henville, and it was Gilberto doing the defending at the far post to deny Aaron Dillon.
Our first half-chance came on 18 minutes when Danny Rose turned on Adam Smith’s cross but volleyed high and wide from the edge of the box.
Two minutes later we came much closer when Kyle Fraser-Allen picked up Smith’s cross-field ball, cut inside onto his right foot, and hit a sweet shot against the post from 20 yards.
But the turning point arguably arrived on 38 minutes when Derby skipper Miles Addison was sent off for a two-footed tackle on Jacques Maghoma.
As a result, we started the second half the brighter of the two sides. The first chance fell to Rose on 52 minutes when Gilberto’s cross from the left deflected into his path, but he fired over.
Three minutes later it was Simon Dawkins who was left with the goal gaping after a great ball from Fraser-Allen, but he miss-controlled his shot.
Another three minutes went by and another great chance went begging. This time Archibald-Henville was guilty of putting a free header from five yards out wide of the post following Rose’s corner.
But it seemed like only a matter of time before something went our way, and indeed it did on 72 minutes when substitute Obika was upended in the box by Jermaine Johnson.
Obika himself duly stepped up to tuck home the resultant penalty and break the deadlock.
Takura Mtandari had a chance to quickly double our lead moments later when he headed over a Rose cross, and Rose himself went close again seven minutes from time.
But the score remained 1-0 and Clive Allen’s side grinded out their second home win in a row.
Spurs (4-4-2): Forecast; Archibald-Henville, Dervite (Cox, 46), Rocha, Gilberto; Smith, Mtandari, Maghoma (Obika, 46), Fraser-Allen; Rose, Dawkins (Mason, 73)
Subs not used: Jansson, Kasim
Derby (4-4-2): Kean; Forde, Addison (sent off, 38), Dudley, Beardsley; Dillon (Connolly, 73), Booth (Johnson, 46), Richards, Mills; Ojamaa, Simmons
Subs not used: Keane, Garton, Severn
Jon Obika's second half penalty was the difference between the sides as our Reserves stretched their unbeaten run to three games with victory over Derby County at Leyton Orient.It was a scrappy affair from start to finish on a damp surface at Brisbane Road, but we looked favourites for the most-part, especially after our opponents were reduced to 10 men shortly before half-time.