Cesar Azpilicueta says Liverpool forward Sadio Mane should have been sent off for catching the Chelsea captain in the face just six seconds into the 2-2 draw on Sunday.
Mane was shown a yellow card by referee Anthony Taylor after his arm struck the Blues defender as they attempted to jump for a header at Stamford Bridge.
Forward Mane went on to score the opening goal following a mistake from Trevoh Chalobah and Mohamed Salah put the Reds 2-0 up in the Premier League battle between second and third.
Chelsea were back on level terms just before half-time following two goals in the space of four minutes, Mateo Kovacic reducing the deficit with a sublime volley and Christian Pulisic equalising.
Neither side could conjure up a winner in a pulsating contest, so Manchester City hold a 10-point lead over the Blues and Liverpool are a further point adrift with a game in hand.
Azpilicueta is in no doubt Mane was fortunate not to be given his marching orders in what was his last game before departing for Africa Cup of Nations duty.
The defender told Sky Sports: "A clear red. I don't mind if it is five seconds into the game, it is a red. I don't understand – we have had these kind of decisions the other day.
"It is a clear red card. We are getting these decisions against us and it can change the way of the game.
"I watched the replay but I didn't need this because live I knew it was a red.
"We had to fight our way back. We left everything on the pitch but it was not enough.
"Both teams had their moments. When they were 2-0 up they think they have a clear chance to score a third and maybe that could kill the game but after that we played well.
"We were 2-0 down, we fought hard to come back. We wanted more of course. We never lost the trust. We felt in the second half we could push for the third goal but we didn't score."
Azpilicueta acknowledges it was a great day for reigning champions City as their two nearest rivals slipped up again.
He added: "They are the ones at the top. The more points we are behind the happier they will be. They have been setting the standards really high.
"It was up to us to close the gap. We know they are a quality team – they have been playing together for a while. We are on our way but until now we didn't reach that level of consistency that would keep us at the top."
Sheffield United go second after late turnaround, Plymouth continue good home form
Sheffield United staged a late turnaround to win 2-1 away to Bristol City and go second in the Championship, one point behind leaders Sunderland who play on Wednesday.
The game started slowly, with the hosts not opening the scoring until a 75th-minute Anis Mehmeti penalty after a foul on Sinclair Armstrong by goalkeeper Michael Cooper.
The Blades showed great character to haul themselves back into the game, with 18-year-old Ryan One scoring the equaliser in the 86th minute.
But things went up a notch in stoppage time when Robert Dickie was given a straight red card for a cynical foul on Callum O'Hare 35 yards out.
The drama wasn't finished yet and with seconds to go, Harrison Burrows smashed home a left-foot rocket to win the game for the Blades.
At the bottom of the table, Plymouth opened a four-point gap between themselves and the relegation zone with a 1-0 victory over bottom-of-the-table Portsmouth.
The victory means that Wayne Rooney's side have dropped just two points in their last five games at Home Park, having lost six on the bounce in all competitions away.
It is now four without a victory for Portsmouth, who have earned just nine points in their opening 14 matches back in the Championship.
Elsewhere, Middlesbrough responded to their 3-0 defeat at home to Coventry City last weekend by beating second-bottom Queens Park Rangers 4-1 on the road.
That was a first victory in three for Michael Carrick's side, who are one place below the play-off positions and trail only by goal difference.
QPR are four points behind fourth-bottom Preston North End, having failed to win any of their last 10 league games.
Liverpool 4-0 Leverkusen: Diaz nets second-half hat-trick to extend 100% start
Luis Diaz scored a second-half hat-trick for Liverpool in their 4-0 victory at home to Bayer Leverkusen as they maintained their 100% start to their Champions League campaign.
Arne Slot's side lead the 36-team league within Europe's main competition following the result, with only Aston Villa alongside them as the only other club to have won every game. They play Club Brugge on Wednesday in their fourth match.
Back in Liverpool, things got off to a slow start with the scores level until the 61st minute. Diaz lifted the ball over goalkeeper Lukas Hradecky to get things moving before Cody Gakpo made it two just two minutes later.
Gakpo's goal was initially ruled offside by the on-field official, though was overturned following a VAR review.
Diaz then scored his second and Liverpool's third of the night in the 83rd minute after picking up Mohamed Salah's cross and slotting past Hradecky. The Colombian rounded things off deep into stoppage time with a tap in from close range.
The result leaves Leverkusen 11th in the table with seven points, having tasted their first defeat of the competition at Anfield.
Data debrief: Slot has Liverpool purring
Liverpool are now top of both the Champions League standings and the Premier League and continue to go from strength to strength under Slot.
They looked much more threatening in the second half compared to the first, registering 3.48 xG in the second period after just 0.64 in the first half.
Diaz, meanwhile, has now scored nine goals in 15 matches in all competitions.
Al-Nassr 5-1 Al-Ain: Ronaldo on target in AFC Champions League win
Cristiano Ronaldo powered Al-Nassr to a convincing 5-1 triumph over Asian Champions League Elite holders Al-Ain on Tuesday.
The victory carried a sense of redemption for Al-Nassr as they avenged last season's semi-final defeat to the same opposition on their way to lifting a second title in the competition.
Talisca fired the hosts into a fifth minute lead with a well-taken effort from the edge of the box before Ronaldo poked home his 908th career goal just after the half-hour mark.
Visiting defender Fabio Cardoso then deflected Angelo's effort beyond Khalid Eisa to hand Al-Nassr a comfortable advantage at the interval.
Al-Ain did, however, pull one back early in the second half when Park Yong-woo's strike struck the post and went in off the back of Al-Nassr goalkeeper Bento.
But the result was put beyond doubt late on when Wesley curled home Al-Nassr's fourth, before Talisca notched his brace in second half stoppage time.
Data Debrief: Return of Ronaldo
After winning five Champions League across his glittering career, Ronaldo is now eyeing a first AFC Champions League crown with Al-Nassr.
The 39-year-old has six goals in eight appearances in the competition, with his goal against Al-Ain ending a three-game goal drought for Al-Nassr.
Ronaldo also registered a team-high expected goals (xG) tally of 1.25 towards Al-Nassr's 2.67 total, while also producing more shots (eight) and touches in the opposition box (nine) than any other player on the pitch.
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