Southampton lasted 90 minutes with 10 men to overcome Swansea City after extra time in a see-sawing third-round FA Cup tie played behind closed doors.
Nathan Redmond put Saints in front, only for Yan Valery to get sent off in the 30th minute for a second booking.
Swansea's Joel Piroe smashed in to force extra time, before Jan Bednarek's own goal gave the hosts a 2-1 lead.
But Mohamed Elyounoussi equalised seconds later and Shane Long struck on the break to give Southampton victory.
This was the first game at an empty Swansea.com Stadium since May last year, a result of Covid-19 restrictions introduced in Wales on Boxing Day which mean that elite sport in the country is being played closed behind doors.