According to Fabrizio Romano, Chelsea and Pochettino, whose abrupt departure from Stamford Bridge surprised many, have agreed to part ways.
Middlesbrough’s Michael Carrick faced a challenging evening, with Chelsea’s dominant performance leading to a 5-1 aggregate win.
Barely four minutes later, Levi Colwill doubled the lead for Chelsea.
It was the Blues’ highest-scoring match of the campaign.
Meanwhile, Chelsea are also into the fourth round after the Blues pipped Brighton one-nil at Stamford Bridge.
The four-goal thriller game ended 2-2 with both teams sharing points at the Emirates.
The game was the one Moisés Caicedo would want to forget in earnest after the Ecuador international gave away a penalty late in the match.
Chelsea and Liverpool failed to get their rhythm in each other’s third half in the second half.
Kovacic, who won the Champions League three times with Real and once with Chelsea, could be one of several departures from the London club as new manager Mauricio Pochettino trims his squad.
The club confirmed the signing via their Twitter account on Tuesday.
