It was the latest of several impressive performances from the Saints skipper, who manager Pochettino believes could well be next in line to represent England.
"I'm very happy for Adam," he said of Lallana, who was called up for England's World Cup qualifier with Ukraine in September 2012 but did not play.
"He's a great bloke and a great professional and he's very passionate about this club, about Southampton, so I'm happy for him.
Pochettino also heaped praise on goalkeeper Artur Boruc, who pulled off a string of fine saves as Southampton recorded a fifth clean sheet of the season.
"He was incredible," Southampton boss Pochettino said of the Poland international. "He did ever so well, but it just shows we have full trust in his performances and his skill, and also in our other keepers.
More top news
The latest weather for the east with Philippa
The latest weather for the west with Philippa
A group of divers have commemorated one century since the end of World War One by hanging a plaque on the bow of a shipwreck off Shoreham.