Tottenham were let off the hook by VAR shortly after the break as James Maddison had a superb finish ruled out for marginal offside, as he took James Justin’s long ball in his stride before burying a shot past Lloris.
Vardy got on the end of Marc Albrighton’s cross from the right and his header at the far post cannoned off Alderweireld into the back of the net.
Spurs pressed in the closing stages as Leicester keeper Kasper Schmeichel kept out Son Heung-min’s close-range effort with a brilliant save before the visitors twice came close to adding a third goal.
Vardy said Leicester executed their game plan to perfection, adding that the Foxes needed to improve their home form after clinching a sixth away win in seven games.
“We’ve come here with a gameplan and we’ve absolutely nailed what we wanted to do,” he told Sky Sports. “It’s set us on the way to get the three points that we think we deserved.”
Sheffield United sink Brighton
In Brighton, visitors were reduced to 10 men when John Lundstram was sent off for upending Joel Veltman in a reckless challenge in the first half, with the referee changing his decision from a yellow card to a red following a VAR review.
Despite Brighton’s domination, United took the lead when Bogle made an impact after coming on as a second-half substitute.
The 20-year-old fired David McGoldrick’s cut-back towards goal and a deflection off Adam Webster took the ball past goalkeeper Robert Sanchez in the 63rd minute.
Brighton substitute Welbeck equalised three minutes from time from a set-piece when the ball fell to him in the six-yard box and the unmarked striker controlled it with his chest before firing a volley into the back of the net.
The home side had numerous chances to score but were denied by the Blades’ dogged defending while McGoldrick nearly struck at the other end with a free kick, only to be denied by a smart save from Sanchez.
Brighton almost came up with the winner in stoppage time when Welbeck’s header was cleared off the line before Alireza Jahanbakhsh headed the ball against the crossbar.