Arsenal legend Martin Keown believes Chelsea's midfield players will decide if they can go on an unbeaten run throughout the season.

After finishing third in the league table, Jose Mourinho has strengthened the squad in the summer transfer window by adding star players like Diego Costa and Cesc Fabregas to the squad.

The former Atletico Madrid striker has been in fine form for the west London club and is the leading goal scorer in the league with eight goals. Meanwhile, his compatriot Fabregas leads the assists chart as he has already made six assists so far this season.

The Blues sit at the top of the table with 16 points after six matches and have already won their first five league fixtures.

Keown was part of the Arsenal squad that went on to win the league without losing a single match. The former Gunners defender has backed Chelsea to be the Premier League's "new invincibles."

"Chelsea's midfield is key to their form and their ability to keep the unbeaten run going," Keown told the Daily Mail.

"Oscar, Willian and Hazard are like terriers closing down the opposition and then you have Matic, the nightwatchman, sitting behind them alongside Fabregas, who at times has played deeper."

"It means the defence are rarely spoken about, even if they will want to concede fewer goals and the team seem driven, with key men switched on by individual targets - just the other day Hazard was talking about matching Lampard's goalscoring feats."

"Could we be seeing the first signs of a team who can go unbeaten all season? Chelsea look impressive and have it in them to go the distance without defeat - they can become the new Invincibles."

"Jose Mourinho's team have already come out unscathed from arguably their toughest game of the season - the trip to Manchester City."

"Mourinho spent most of last season telling us his Chelsea team were not good enough. A lot of people, including me, thought it was just mind games but he was right and quickly identified the players he needed in the summer."

"Financial Fair Play rules made him a better wheeler-dealer too: he balanced the books well by selling David Luiz and Romelu Lukaku for big money and bringing in Diego Costa, Cesc Fabregas and Filipe Luis."

"Mourinho has consistently made quick, ruthless decisions since his return to Stamford Bridge, selling Juan Mata, allowing Frank Lampard and Ashley Cole to leave, dropping Petr Cech and moving on Lukaku and Luiz," the Gunners legend concluded.

Meanwhile, Chelsea host Arsenal in the Premier League clash on Sunday and the last time these two teams met at Stamford Bridge saw the Blues seal a 6-0 win.