After a goalless first half which saw Newcastle miss several opportunities to score, the hosts finally took the lead through Dan Burn. The left-back burst forward to net his first goal for the club in front of the Gallowgate End.
Joelinton then doubled United’s lead in the 72nd minute with a neat finish from Miguel Almiron’s well-weighted pass.
It’s the first time Newcastle have reached the semi-final of the League Cup since 1976.
Here are the Newcastle player ratings from the match...
1. Nick Pope - 7
Was alert to come off his line and clear the danger on several occasions but rarely tested in terms of shots. A seventh consecutive clean sheet.
2. Kieran Trippier - 8
Brilliant defending to stop Leicester scoring as Patson Daka attempted to square the ball to Harvey Barnes for a tap-in. Posed an attacking threat down the right.
3. Fabian Schar - 7
Had a couple of lapses of concentration early on but quickly gained his composure and kept Leicester at bay.
4. Sven Botman - 8
Rarely tested as he remained strong in the air and on the ground. Booked.