Zlatan Ibrahimovic and Anthony Martial each netted a brace as Man United beat West Ham to book a place in the EFL Cup semis.
Southampton are through to the League Cup semi-final for the first time in 30 years, after beating Arsenal 2-0.
Manchester United manager Jose Mourinho said that his team had played "beautiful, attacking football" in their 4-1 victory over West Ham.
Arsene Wenger said Arsenal lacked urgency in their 2-0 loss to Southampton in the EFL quarterfinals on Wednesday, but had no regrets about his XI.
FC's Craig Burley feels that the absence of Paul Pogba allowed Manchester United to play with more pace against West Ham.
Southampton handily knocked Arsenal out of the EFL Cup, the FC panel believe Arsenal is secretly pleased with this result.