Substitute Martinez sealed the win for Inter from the spot five minutes from the endof the game after Simone Inzaghi's men were awarded a penalty for a handball.
Calvert-Lewin, who ended a run of 23 games without a goal in Tuesday's 1-1 draw at Newcastle, scored at the endof a poor first half, when Muric's attempted clearance struck the Toffees frontman before looping over the Burnley keeper and into
Manchester City kept their title hopes alive by scoring four second-half goals to thump Aston Villa and end a run of three straight Premier League defeats.
Chris Coleman's side entered the biggest game in Welsh football history at their first major tournament since 1958 carried by a wave of emotion and optimism after their 3-1 win against Belgium in the quarter-final.
Liverpool reached the FA Cup fifth round with an entertaining victory over Norwich in their first game since manager Jurgen Klopp announced he will leave at the endof the season.
However, there is zero sense of structure and it can only be wondered what new technical director Jason Wilcox made of it as he watched his first game in the Old Trafford directors' box since his appointment was confirmed last week.
England captain Harry Kane, inevitably, was involved with a deft touch to release Kingsley Coman, who easily beat exposed United keeper Andre Onana in front of the Stretford End.
An entertaining encounter looked set to end in stalemate before - with the game entering stoppage time - Firmino soared to flash a header high past Spurs keeper Hugo Lloris from Andrew Robertson's corner.
Harry Kane scored twice as Tottenham beat Borussia Dortmund to get their Champions League campaign off to a positive start and end their winless run at Wembley.
City manager Manuel Pellegrini warned he would select a shadow side after the game was scheduled for late on Sunday, ahead of Wednesday's Champions League match against Dynamo Kiev in Ukraine.
An emotional Terry, who will leave at the endof the season after more than two decades at the club, swept in a loose ball from a corner for the opener.
Chelsea scored two late goals as they came from behind to claim a dramatic victory against Watford at Stamford Bridge and end a three-game winless run.
The Cherries went in front at the endof a scrappy first half when Justin Kluivert's shot squirmed under Fulham goalkeeper Bernd Leno after a brilliant mazy run from Alex Scott to create the chance.
But De Bruyne's curling effort was a sublime equaliser just 10 minutes later and, with a starring role for the rest of the game, City boss Pep Guardiola said their success was thanks to his "incredible" qualities.
However, Cagliari got back into the game when a Jakub Jankto corner found Alberto Dossena to steer the header in at the far post. This ended a run of six consecutive Serie A clean sheets for the Bianconeri, 615 minutes of football.
The drama then switched to the other end in eight added minutes as Declan Rice's deflected shot gave Arsenal the lead before substitute Gabriel Jesus raced clear to wrap up the win as the stadium exploded in elation.