Harry Kane scored his eighth goal of the season as Tottenham won at Brighton to strengthen their place in the top three of the Premier League.
The England striker's stooping first-half header was enough to secure a victory that keeps Spurs third and three points behind leaders Manchester City.
Brighton, who could have moved level on points with the visitors with a win, started slowly but grew into the game and had chances to equalise before the break.
Lewis Dunk sent a header just over the bar before Solly March hit a low effort just wide of goal as half-time approached.