Jacques Maghoma was sent off in the second half with the score at 1-1 and the 10 men held out until four minutes from time when the home side bundled the winner home from a corner.
An injury-hit squad including trialist Liam Sercombe started brightly and took the lead when Stuart Lewis (pictured right) curled home a free-kick after 20 minutes.
However, Coventry hit back before the break and finally grabbed that late winner.
Here is PatÃ¢â‚¬â„¢s rundown. Ã¢â‚¬Å“We started brightly and got behind them a couple of times with our wide play and took the lead with a good free-kick from Stuart Lewis, 25 yards out and it curled in.
Ã¢â‚¬Å“We then had another great chance, good play down the right and Simon Dawkins should really have scored but unfortunately missed the target from six yards.
Ã¢â‚¬Å“I think the fact that we were a little patched up began to tell, Coventry got the upper hand and we were holding on. They equalised before half-time from a corner - the ball bounced around, we didnÃ¢â‚¬â„¢t deal with it and it ended up in the top corner.
"We started the second half and it was going okay but there was then an incident when a lad pulled Jacques MaghomaÃ¢â‚¬â„¢s shirt, Jacques pushed him away in frustration and the referee deemed that heÃ¢â‚¬â„¢d struck him and he was shown the red card. So we were down to 10 men and it was always a case of could we hang on.
"The lads really worked hard for the point and David Button had one of his best games for us in goal but then four minutes from time Coventry had another corner that we didnÃ¢â‚¬â„¢t deal with, the ball bounced around again and in it went.
"It was a frustrating afternoon and I felt a little sorry for the lads to be honest because they worked so hard in that second half it would have been nice for them to have got something out of it."
Spurs U18s: Button, Riley, Smith, Lewis, Peprah, Martin, Davis, Sercombe, Dawkins, Maghoma, Hellar. Unused subs: Lake, Hutchins.
Pat Holland felt his Under-18s deserved some reward for their efforts after defending stoutly with 10 men for the final 35 minutes before succumbing to a late defeat at Coventry.