Martinez struck inside two minutes before Domenico Berardi equalised, but Lukaku gave Inter breathing space with a powerful strike and a penalty before half time.
Juventus midfielder Arturo Vidal was dropped by coach Antonio Conte on Sunday and is also likely to be fined after returning late from a World Cup qualifier with Chile.
News of all that transpired on and off the football field
Manchester City tightened their stranglehold at the top of the Premier League on Wednesday by trouncing bottom club West Bromwich Albion 3-0 as nearest rivals Manchester United suffered a chastening 2-0 defeat at Tottenham Hotspur.
LeicesterCity manager Claudio Ranieri hopes Chelsea midfielder N'Golo Kante will be given a warm reception when he returns to his old stomping ground for the first time since leaving the English champions.
Chelsea forward Eden Hazard expects ManchesterCity and Liverpool to be the London side's main rivals in the Premier League title race after the top three sides all enjoyed victories on the weekend.
Images from Sunday's English Premier League matches.
Manchester United's Jose Mourinho, humbled for the second time this season in front of the Chelsea fans who once idolised him, did not go quietly on Monday as he declared that he remains the London club's number one manager.
Chelsea had the look of champions again as they maintained their comfortable seven-point advantage at the top of the Premier League with a 3-1 victory at Bournemouth on Saturday -- but Tottenham Hotspur will not give up the chase.
City, who have a 16-point lead, can win the Premier League title with a victory over Jose Mourinho's side at the Etihad Stadium on Saturday, but after their 3-0 loss to Liverpool in the Champions League on Wednesday, Guardiola said the players needed a lift.
Images from Sunday's Premier League action.
A summary of Sunday's action in Serie A and Bundesliga.
The victory, Chelsea's 28th of the season, put the long-time league leaders 10 points clear of second-placed Tottenham Hotspur, who have only three games left to play.
Liverpool will attempt to sweep away the January blues on the last day of a wretched month when they host commanding Premier League leaders Chelsea at Anfield on Tuesday.
Tottenham Hotspur and Liverpool raised the spirits with a rip-roaring 2-2 draw in a pre-Christmas Premier League classic on Sunday after a weekend marred by COVID-19 related postponements.
Former player and reserve team boss Santiago Solari has been put in caretaker charge after negotiations between the club and former Chelsea, Italy and Juventus boss Antonio Conte broke down on Monday, the club added.
News of all that's transpired on and off the football field
Manchester United and Tottenham Hotspur are second and third respectively, a point ahead of Antonio Conte's men.
Italy midfielder Antonio Candreva gave a dazzling performance as he scored a penalty and set up a second goal in a 2-0 win over Finland in their fast-paced final Euro 2016 warm-up in Verona on Monday. The 29-year-old winger coolly converted a 27th-minute spot kick after being brought down and delivered an inch-perfect cross for Daniele De Rossi to head home midway through the second half. Thriving on the right flank in an adventurous 3-4-3 formation, Candreva was a handful for the visitors throughout the evening, showing blistering pace as well as neat footwork. With their coach Antonio Conte fielding a three-pronged attack of Stephan El Shaarawy, Ciro Immobile and Simone Zaza, the Italians pressed high and hard to keep the Finns on the back foot from the start.
IOC set up a disciplinary commission to investigate allegations made against US sprinter Marion Jones by BALCO chief Victor Conte.
IMAGES from the Serie A match played between Juventus and Sampdoria on Sunday.
City are 18 points clear of second-placed Liverpool after beating Chelsea 1-0 at the Etihad Stadium on Sunday and need just four wins from their final nine games to be sure of the title.
Pogba suffered the injury in United's 3-0 Champions League win over Basel this month.
Following is a match by match look at the English Premier League's weekend fixtures:
Following is a match by match look at the English Premier League's weekend fixtures:
Chelsea ticked off three more points in their Premier League title quest with a 2-1 victory over Manchester City on Wednesday but Tottenham Hotspur's Houdini-like 3-1 win at Swansea means the race is far from over.
Coach Massimiliano Allegri dismissed suggestions that the newly crowned Serie A champions have nothing to lose
This and more from the happenings in the world of football
Chelsea staged a spectacular comeback with three goals in nine second-half minutes to beat Southampton 3-2 on Saturday and revive their faint hopes of a top-four Premier League finish as Saints remained in the drop zone.
The move would end a turbulent spell at the club for the Argentine, who has fallen out with fans along on the way and provided fodder for the gossip columns thanks to his marriage to Wanda Nara, a media personality who also acts as his agent.
Chelsea moved 12 points clear of Arsenal, who suffered their fourth defeat in nine league matches, while fourth-placed Liverpool fell 13 point adrift after their wretched 2017 continued with a shock 2-0 defeat at resurgent Hull City.
Chelsea are now 11 points ahead of Manchester City who have 13 games left to play and while Italian Conte is too cagey to start proclaiming his side yet, only a monumental loss of form can deny them the title.
Chelsea's 1-0 win over Liverpool on Sunday shows they have rediscovered the kind of work ethic it takes to get results in the Premier League, defender Gary Cahill said.
Arsenal denied Chelsea the double with a 2-1 victory in an enthralling FA Cup final.
Images from EPL matches played on Saturday.
German Interior Minister Horst Seehofer on Sunday backed a possible restart for the Bundesliga season this month without spectators as the government prepares for a key meeting next week.
Chelsea goalscorer Willian said they must go on the attack against Barcelona at the Nou Camp next month to have any chance of reaching the Champions League quarter-finals.
Barcelona have emerged as favourites to be crowned champions after one defeat in their last 22 Liga games.
Shakhtar dominated possession as expected but were toothless up front and Inter opened the scoring with their first chance after 19 minutes.
Leicester City boss Claudio Ranieri is not losing sleep over his team's Premier League title defence and believes the pressure to succeed is more on the new managers of the big-name clubs.