![TENNIS on Twitter: "36-year-old Roger Federer has beaten Robin Haase in Rotterdam to become the oldest No. 1 in ATP history. John Berkok breaks down this historic achievement: https://t.co/VKYF5Tes2d https://t.co/0sZxbhprmf" / Twitter TENNIS on Twitter: "36-year-old Roger Federer has beaten Robin Haase in Rotterdam to become the oldest No. 1 in ATP history. John Berkok breaks down this historic achievement: https://t.co/VKYF5Tes2d https://t.co/0sZxbhprmf" / Twitter](https://pbs.twimg.com/media/DWLu6ltU0AIZCNl.jpg)
TENNIS on Twitter: "36-year-old Roger Federer has beaten Robin Haase in Rotterdam to become the oldest No. 1 in ATP history. John Berkok breaks down this historic achievement: https://t.co/VKYF5Tes2d https://t.co/0sZxbhprmf" / Twitter
![BBC Sport on Twitter: "The oldest world number one in tennis history 🐐 Roger Federer has beaten Robin Haase at the Rotterdam Open. Full story: https://t.co/7j68fB89ZZ https://t.co/UkvX25x1a8" / Twitter BBC Sport on Twitter: "The oldest world number one in tennis history 🐐 Roger Federer has beaten Robin Haase at the Rotterdam Open. Full story: https://t.co/7j68fB89ZZ https://t.co/UkvX25x1a8" / Twitter](https://pbs.twimg.com/media/DWLsSAEXUAMQGuk.jpg)
BBC Sport on Twitter: "The oldest world number one in tennis history 🐐 Roger Federer has beaten Robin Haase at the Rotterdam Open. Full story: https://t.co/7j68fB89ZZ https://t.co/UkvX25x1a8" / Twitter
![Roger Federer: Robin Haase retweets hilarious comment on eve of Rotterdam Open clash | Tennis | Sport | Express.co.uk Roger Federer: Robin Haase retweets hilarious comment on eve of Rotterdam Open clash | Tennis | Sport | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/72/750x445/919674.jpg)
Roger Federer: Robin Haase retweets hilarious comment on eve of Rotterdam Open clash | Tennis | Sport | Express.co.uk
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