The Serb had a magnificent 2018, making an astonishing climb back from outside the world's top 20 in June, winning Wimbledon and the US Open on the way to reclaiming the number one ranking in November.
"He (Djokovic) continues to challenge me. I played him in his prime when he was virtually unbeatable. It was important not to get frustrated by it. I always enjoy my matches against him," 20-time Grand Slam winner Federer said at the draw.
"We are both natural attacking players. We are aggressive. He is up there with Nadal and Hewitt they make me rethink my game. I like to play attacking tennis, so I've come full circle."
Second seeded Nadal begins against Australian James Duckworth, fourth seed Alexander Zverev faces Slovenian Aljaz Bedene while last year's runner-up Marin Cilic has a tricky encounter with Australian Bernard Tomic.
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