Lightning strikes over Melbourne Park during a first-round doubles match. (Robert Prezioso/Getty Images)
MELBOURNE, Australia -- Day 4 at the Australian Open didn't lack for storylines or drama.
Extreme heat and lightning kept the weather front and center. Maria Sharapova narrowly escaped. Juan Martin del Potro wasn't as unfortunate, losing a late-night five-setter to Roberto Bautista Agut. Andy Murray closed out his victory by winning 23 consecutive points. Nick Kyrgios, 18, made quite an impression in a five-set loss to Benoit Paire. And Donald Young notched a career-best result here with a second-round upset of No. 24 Andreas Seppi.
Here are some of our favorite photos from Day 4.
Rafael Nadal: Amid all the noise, the ferocity is constant. (Clive Brunskill/Getty Images)
Donald Young: The 24-year-old American upset Seppi 6-4, 2-6, 6-3, 4-6, 7-5 for his first third-round appearance at a Slam since the 2011 U.S. Open. (Ryan Pierse/Getty Images)
Maria Sharapova: The No. 3 seed was stretched to the limit in a 6-3, 4-6, 10-8 victory over Karin Knapp. (Cameron Spencer/Getty Images)
Jerzy Janowicz: This should be everyone's new Facebook cover photo. (Vince Caligiuri/Getty Images)
Gael Monfils: Reduce, reuse, recycle. (Michael Dodge/Getty Images)
Maria Sharapova: Beats by Pova. (Clive Brunskill/Getty Images)
Jo-Wilfried Tsonga: We are mercifully using this picture instead of the ones of Tsonga wearing a visor sideways because we prefer our Tsonga fierce and fiery, not looking like a washed up tennis pro. (Paul Crock/AFP/Getty Images)
Benoit Paire: The Frenchman takes (and breaks) the baton passed on by Ernests Gulbis. (Eugene Hoshiko/AP)
The Dane reached the third round with an up-and-down performance against Christina McHale. (Aaron Favila/AP)