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Can’t believe I’m writing this right now and I’m finding it hard to put into words.
I’m absolutely devastated by this news," Kelleher wrote in a moving tribute on Instagram.
"All my thoughts and condolences are with Rute and their 3 beautiful kids and Diogo and Andre’s family.
It was a such a pleasure to get to know you over these years and to share some special memories on the pitch and even more so off it.
"You became one of my closest friends in football.
We bonded over all things sports watching any football match we could find often your brother Andre’s game on your iPad.
"I was surprised a lad from Portugal loved sports such as darts, snooker and horse racing so much and some of my best memories were having a laugh watching them with you.
"You were such a fun genuine, normal down to earth and loving family man and always very competitive I’m gonna miss our pre match programme quiz.
"I feel so blessed and grateful to have seen you on your happiest day, the day of your wedding and to be able to share in that day with you was special.
It’s gonna hurt for a long time and I’m gonna miss you so much but I feel so lucky to have got know you and have such a good friend.
"Love you Diogo."
Diogo Jota and Caoimhin Kelleher became the best of friends at Liverpool (Image: Andrew Powell/Liverpool FC via Getty Images)