Spaniard pledges future to Boro with contract extension
The Spanish centre-half has been locked in talks with Boro since the end of last year but, they had failed to strike a deal and other clubs were beginning to show an interest.
However, Boro recognise just how Ayala is important to them, after he has starred for them in the past two seasons - and now he has agreed to the deal that will run until 2020.
Ayala was snapped up by then-Boro boss Tony Mowbray in late 2013 from Norwich City initially on loan before signing a permanent deal, and he has been a near even-present ever since, becoming a firm fans' favourite.
Now any concerns over his future have been put to bed with what will be a huge boost to Boro on the eve of the Premier League season.
Head coach Aitor Karanka and Ayala had also clashed last season, but the Boro boss has never hidden his desire to keep him and he will be buoyed by the news.
“I didn’t think about anything else. I only had one decision in my mind and that was to sign with Middlesbrough," Ayala told Middlesbrough's official website.
“When I wasn’t at my best Boro gave me the chance, and I’ve improved myself under Aitor Karanka. All of the fans really like me and I’m really settled here.
“My family are really happy here, my son was born here and hopefully my second will be born here too!”
Ayala is currently sidelined with an ankle injury which has stopped him from featuring in any pre-season game, although Boro remain hopeful he could be fit to feature in their league opener against Stoke City.