Alzate, who was signed from Leyton Orient in 2017, told Brighton's website: "The manager has been integral for me. He gave me the opportunity to make my debut and to kick on from there.

"When I made my debut I had to prove myself, but he has given me the opportunity to make that impression and I think I have taken it with both hands."

Alzate, 21, made 19 Premier League appearances as Albion finished 15th, although his season was curtailed by groin surgery.

Connolly scored three times in 24 top-flight appearances, claiming Sunday's winner at Burnley having netted twice in a 3-0 win over Tottenham in October.

"It's fantastic the club have given me this kind of security because it means I can push on now for the next four years. It will help me relax and enjoy my football even more," said the 20-year-old.

"This season has been unbelievable at times and obviously the Tottenham game when I scored twice was a big moment for me."