"It's hard to see this day" - Djokovic pays tribute to Roger Federer

Over the years, Novak Djokovic and Roger Federer developed a fierce rivalry, with Djokovic faring better versus Federer than the average player.

The Serbian paid tribute to Federer in an Instagram post after taking a day to reflect on the news. They shared the court frequently with Djokovic having a 27-23 advantage, and they'll do it again in London the following week.

As a part of the Team Europe Laver Cup lineup, they will play on the court together once more at the O2 Arena. The competition in question will be Federer's last.

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Read the full Roger Federer farewell letter

"Roger it’s hard to see this day and put into words all that we’ve shared in this sport together. Over a decade of incredible moments and battles to think back on. Your career has set the tone for what it means to achieve excellence and lead with integrity and poise.

It’s an honour to know you on and off court, and for many more years to come. I know that this new chapter will hold amazing things for you, Mirka, the kids, all your loved ones, and Roger fans still have a lot to look forward to. From our family to yours, we wish you much joy, health, and prosperity in the future. Looking forward to celebrating your achievements and seeing you in London."