Last year's quarterfinalist, Nick Kyrgios, began this year's tournament by ousting Diego Schwartzman in straight sets.
But while the score itself was straightforward, Kyrgios became embroiled in controversy after calling someone "dirty scum" following an exchange with the chair umpire. He later said he was referring to himself.
His match, and the others during the day at the All England Club, took place amid plenty of sunshine and warm temperatures. A heat wave is on the way, too.
Lleyton Hewitt, Kyrgios' countryman -- and reportedly his future Davis Cup captain -- played his final Wimbledon match after losing to fellow veteran Jarkko Nieminen 11-9 in the fifth set in exactly four hours. Hewitt won the title in 2002.
Hewitt was supported throughout the match by the "Fanatics," a set of supporters who routinely back Aussie players.
Defending champion Novak Djokovic faced Germany's Philipp Kohlschreiber to open play on Center Court. They were joined by a tiny bird, too.
Djokovic beat the talented Kohlschreiber in straight sets, all by 6-4. He broke to end each set. Djokovic entered Wimbledon having lost the French Open final.
Serena Williams, the women's No. 1, made a sluggish start against Russia's Margarita Gasparyan, falling behind 3-1. But she ran out a 6-4 6-1 winner.
Williams is seeking a fourth straight major title. If she gets there, the American would complete the "Serena Slam" for the second time in her career.
Andy Murray is used to winning matches at Wimbledon, but he finally got some British company Monday. Wildcard Liam Broady rallied from two sets down to edge Australia's Marinko Matosevic and reach the second round.