There was Rui Costa and there was Marco Materazzi. Beauty and the brawn. The elegant Portuguese shouldering the weight of his grizzled opponent's elbow. Tranquillity amid the chaos as a pair of footballing rivals paused to ponder a hazy wall of red smoke and simmering flares. "Everyone was focused on the flares, on the smoke," photographer Stefano Rellandini, who captured that iconic image 21 years ago, tells BBC Sport. "But near the centre of the pitch I saw a certain moment. "Materazzi was nicknamed something like a butcher; he is not really a gentle player. Rui Costa was the opposite - more gentle, more artistic in his football. For several seconds Materazzi put his elbow on the shoulder of Rui Costa. "So when I saw that, I shot it. I have just one frame in that sequence. That was the moment." AC Milan v Inter Milan Saturday, 31 October - live from 19:40 GMT

With the game evenly poised at 2-2 following goals from Angelo Gabriel and Sadio Mane for for Al-Nassr, Ronaldo secured the win for his side by scoring three times in 15 second-half minutes. His Portugal team-mate Joao Felix contributed four assists, including for two of Ronaldo's goals. It was the 67th hat-trick of the 41-year-old's career as he continues to chase another milestone in a glittering career. He has scored seven of his hat-tricks for Al-Nassr - along with 44 for Real Madrid, 10 for Portugal and three each at Manchester United and Juventus. The five-time Ballon d'Or winner has won league titles in England, Spain, Italy and Saudi Arabia and is the all-time top goalscorer in men's international football. He has spent almost four years at Saudi Pro League champions Al-Nassr, with whom he has one year remaining on his contract. In August, he hinted at retirement by saying it was "probably" his last year playing. Al-Nassr are defending champions in the Saudi Pro League and sit second in the table, although they have a game in hand on leaders Al-Qadsiah.

The tie was, inevitably, settled on a shootout after finishing level in normal time when a Morgan Rogers penalty for the visitors was cancelled out by a Cody Gakpo spot-kick at the other end. In a tense outcome, Valentin Barco hit the woodwork for Chelsea, but Kostas Tsimikas blazed over for Liverpool and former Reds captain Henderson levelled. Blues keeper Mike Penders then saved from Ryan Gravenberch, but Giorgi Mamardashvili kept out Emmanuel Emegha's effort and, after Joe Gomez had scored, Wesley Fofana skied his spot-kick over. It was Liverpool's fifth straight success on penalties against Chelsea as the 10-time winners booked an Anfield meeting with Andoni Iraola's former club Bournemouth. Both managers made a number of changes from the weekend's Premier League games, with Iraola making seven from Liverpool's win over Brighton. Alonso, who won the Champions League in 2005 as a player with the Reds, made four changes for Chelsea, with Henderson among the starters in the absence of the suspended Cole Palmer and injured Joao Pedro. Neither goalkeeper had any saves to make in the opening stages but the contest burst into life in the 40th minute when Gravenberch made a poor challenge on Moises Caicedo in the box and referee Darren England awarded the Blues a penalty. Henderson picked up the ball and was greeted by a chorus of boos before handing over to Rogers, who sent Mamardashvili the wrong way. But Chelsea's joy was short-lived as Fofana handled the ball in the box just three minutes later. Cody Gakpo stepped up to send Penders the wrong way for his 11th goal in the competition. Alonso was forced to make a change before half-time as centre-back Maxence Lacroix was injured and replaced by Levi Colwill. Just before the hour mark, Iraola turned to his bench as he brought on Florian Wirtz and Bradley Barcola for Lewis Koumas and James McConnell, who were both booked in the first half. Liverpool upped the ante and Chelsea remained a threat on the counter-attack, but neither side could find a winner. Penders, who made an error in his side's 2-0 home league loss bySpurs on Saturday, made two great saves to keep out Ronald Araujo and Barcola. At the other end Marco Palestra forced Mamardashvili into a brilliant save, but surprisingly, Alonso didn't bring Estevao on to try to make a difference. With no extra time, it went straight to penalties and could have gone either way until Fofana's miss proved decisive.

Rulli kept out the final two spot kicks from Yasin Ayari and Lewis Dunk to send City through to face League One side Bradford City in the last eight. Brighton stunned the home crowd by going ahead on the half hour mark through Malick Yalcouye's finish from close range, the midfielder converting from Georginio Rutter's cross. But five minutes before half-time, City drew level courtesy of Mateo Kovacic's strike from long range which flew past the reach of Jason Steele and nestled in the bottom corner. Just seconds after the restart, Fabian Hurzeler's side retook the lead following Rutter's fine first-time finish from Jaouen Hadjam's clever cutback. Brighton could have extended their lead further but Rulli made a stunning fingertip save to deny Rutter a second, while the Frenchman also hit the side-netting after going round the City goalkeeper. Rayan Cherki saw an effort deflect narrowly wide as City looked to claw their way back into the tie, before his low free-kick was flicked into the net by Vitor Reis' outstretched foot. Substitute Mats Wieffer struck the post late in the second half for Brighton but the match went to penalties before Rulli's heroics sent City through.

Mikel Arteta's side were left shell-shocked when Aaron Loupalo-Bi gave the hosts - ranked 84 places below the Gunners in the football pyramid - an unexpected lead in the 21st minute. Viktor Gyokeres pulled the visitors level after the break, but a wasteful Arsenal side could not put the game to bed and they were reduced to 10 men in the 86th minute when teenager Max Dowman kicked out after a hefty tackle by Harrison Neal and was sent off. Jay Lynch made two sublime saves to stop Ben White and Martin Odegaard right at the death to take the hosts to penalty shootout. And the Fleetwood goalkeeper pulled off more heroics as he stopped Bruno Guimaraes' spot-kick before Conor Haughey sparked scenes of ecstasy at Highbury Stadium by converting the winning penalty. Fans flooded on to the pitch, players swore in their post-match interviews, while manager Matt Lawlor was reduced to tears during the emphatic celebrations. Fleetwood will find out their quarter-final opponents when the draw takes place following Chelsea's game against Liverpool on Wednesday.