The Saints pair were both called up for the England squad set to face Denmark in a friendly this week by Three Lions boss Roy Hodgson ahead of this summer’s World Cup in Brazil.
25-year-old Lallana believes his young colleague is the best he has seen at the tender age of 18 after an impressive season that has seen Shaw linked with moves to Premier League giants Chelsea and Manchester United.
"Luke wouldn't for one minute have thought he'd be involved in the senior team but he's an outstanding talent and one of the best, probably the best player I've ever seen at 18,” Lallana explained.
Southampton’s youth academy has developed some of the country and even the world’s best players in the last decade – the likes of Arsenal duo Theo Walcott and Alex Oxlade-Chamberlain along with world record transfer Gareth Bale who moved from Tottenham to Real Madrid in the summer.
Lallana played alongside Bale in his early career at Southampton for the 2006/2007 season and the England international has compared his young compatriot to the Welsh ace at the Bernabeu but was reluctant to place expectations on the teenager.
"It's hard to compare him with the others: Gareth's gone on and never looked back,” he said.
“I know Gareth did play left-back as well, so there are similarities there, but I wouldn't want to put too much pressure on Luke. He's done unbelievably for us this season.”