Watch as Romelu Lukaku makes an immediate impact and Denzel Dumfries snatches a last-gasp Inter winner at the Stadio Via del Mare.
The former Chelsea striker took 82 seconds to feel right back at home in Serie A by nodding in as Matteo Darmian knocked down the Federico Dimarco cross.
Assan Ceesay scored from the tightest of angles to draw newly-promoted Lecce level and Wladimiro Falcone performed heroics in goal to keep them in it.
However, with the last kick of the game, Dumfries bundled over the line following another save on Stefan de Vrij.
Lecce look good, but lower sides always get beat in the last minute. Will they stay in Serie A like Monza?