Leicester City became the first team in English football to score a goal via a decision by the video assistant referee as they overcame Fleetwood 2-0 in their FA Cup replay on Tuesday.
Kelechi Iheanacho opened the scoring two minutes before the break when he latched onto a through ball from Islam Slimani, took a touch and beat Chris Neal.
And he made it two in the 77th minute with the first goal awarded by VAR in UK football. Iheanacho delightfully lofted the ball over Neal but was initially denied by an offside flag. However, referee Jon Moss consulted technology and subsequently awarded the goal about 70 seconds later.
The use of VARs is being trialled in England in the FA Cup and the Carabao Cup this season but not yet in the Premier League.
West Ham prevailed in extra time over League One Shrewsbury after Reece Burke finally found the breakthrough to secure a 1-0 victory.
The first game between the sides ended 0-0 after 90 minutes, and it was the same case on Tuesday.
But after more than 200 minutes without a goal, Burke stepped up with eight minutes to play and put the ball in off the underside of the crossbar for his first senior goal for the Hammers.
Jon Dadi Bodvarsson fired a hat trick to lead Reading to a 3-0 win over Stevenage.
The Icelander struck after 32, 44 and 64 minutes to book the Royals a fourth-round date with Sheffield Wednesday after their win over Carlisle. Wednesday avoided an upset as they saw off the Cumbrians 2-0 at Hillsborough.
Marco Matias gave the Owls a 28th-minute lead and Atdhe Nuhiu struck in the 66th minute to wrap up victory.
Cardiff will host Manchester City in the next round after hitting four for second consecutive game after a 4-1 win over Mansfield.
Danny Rose cancelled out Bruno Manga's opener for the Bluebirds as the sides were locked 1-1 at half-time, but it was after the break where Cardiff took charge with a pair of goals from Junior Hoilett and another from Anthony Pilkington.