Kyle Bartley has signed a new three-year contract with Swansea City.
Bartley's contract was due to expire at the end of the 2014-15 season and manager Garry Monk is happy to have convinced him to stay.
"He has all the ingredients to be a top player for me," said Monk.
The manager - a former central defender - added that Bartley's age and promise made it important for Sweansea to act fast.
"It was important to get him signed because he's a young player," he added.
"Kyle's a great prospect for us, and one that I want to build up knowing that position as well as I do.
"I can see the potential in him."
Monk recalled Bartley from his Birmingham loan in February 2014, using him sporadically as the Swans recorded a 12th-placed finish.
And Bartley is eager to make more first-team appearances in the Premiership.
"Both the managers have given me a lot of confidence in myself in the three years.
"I turned 23 a couple of months ago and I feel like I'm ready now, I'm at a good age.
"It's never going to be easy for a young centre-half to be playing in the Premier League, but I'm confident in my ability, I think the manager is too and hopefully I can do it."