Granit Xhaka propelled Arsenal into an undeserved lead in the first half, but an astonishing Pedro Goncalves effort from at least 50 yards forced extra time in North London.
The Gunners came from behind to draw 2-2 after Arteta made six changes to the team which snatched a last-gasp victory over Bournemouth on Saturday.
Osimhen has enjoyed an extremely productive 2022/23 campaign, netting 19 Serie A goals in just 21 outings.
Mikel Arteta’s side were trailing by two goals with just over half an hour left. But the Gunners showed they can cope with the pressure of the title race with a remarkable comeback that kept them five points ahead of second placed Manchester City, who defeated Newcastle United earlier in the day.
Arsenal re-established a five-point lead over Manchester City at the top of the Premier League table courtesy of a 4-0 win over Everton at the Emirates Stadium.
Gabriel Martinelli’s strike 50 seconds into start of the second half was enough to propel the Gunners over the line.
The Foxes failed to make their first-half dominance count in a 3-0 loss to Manchester United last weekend, while the Gunners beat Aston Villa 4-2 in one of the games of the season.
The Gunners qualified for the last 16 of the Europa League directly by finishing top of Group A above PSV Eindhoven.
Talks are ongoing over a fresh deal, which has yet to be signed, but the feeling is that an agreement is close.
With just minutes left at Villa Park, Mikel Arteta’s side were in danger of stumbling again in their bid to win the title for the first time since 2004
The Arsenal and England wide man currently has a contract which runs until 2024, and it is believed that the club have made it their top priority to ensure his future lies firmly with the Gunners.
In the most eagerly anticipated Premier League clash this season, City seized the momentum in the title race
After struggling to make much of an impact on loan at Middlesbrough for the second half of last season, it was crucial for Arsenal to get Balogun’s next move right, and they certainly did just that.
The Gunners suffered a 1-0 defeat to Everton last weekend but were unable to put three points on the board in North London, with Brentford coming from behind to secure a share of the spoils.
The 21-year-old has unexpectedly stormed to the top of the Ligue 1 goalscoring charts during his loan spell with Reims, scoring 14 goals in 21 top-flight matches.
The 21-year-old has been in sensational form since joining the French club on loan in the summer, scoring a league-high 14 goals in 21 Ligue 1 appearances.
The 40-year-old led his side to two victories and a draw from meetings with Newcastle United, Manchester United and Tottenham Hotspur to maintain their unassailable lead over Manchester City at the top of the table.
Financial details of the transfer were not disclosed but British media reported the deal was worth 12 million pounds ($14.78 million).
The striker joined the Arsenal academy at age eight, and he worked his way up to make his debut for the club in 2020, although he has had to settle for 10 appearances for the Gunners, where he has contributed with two goals and one assist.
The Italy international would have been free to leave the Blues at the end of his contract this summer, and talks over a new deal did not yield a positive solution.