Day 5 of the 2012 Austalian Open is in the books, with most of the third-round notables advancing. Both Roger Federer and Rafael Nadal picked up wins in the first round, while John Isner was defeated by Feliciano Lopez, removing the last American player from the men's tournament.

In other Day 5 action in the men's tournament, No. 11-ranked Martin Del Potro of Argentina advanced by defeating Yen-Hsun Lu of Taipei in straight sets, 6-2, 6-3, 6-0. Australian Bernard Tomic bested No. 13 Alexandr Dolgopolov in a hotly-contested five sets, 4-6, 7-6 (0), 7-6 (6), 2-6, 6-3. No. 7-ranked Czech player Tomas Berdych defeated No. 30 Kevin Anderson of Russia in straight sets, 7-6 (5), 7-6 (1), 6-1. No. 10 Nicolas Almaro of Spain defeated Stanislas Wawrinka in sets of 7-6 (2), 6-2, 6-4.

In the women's tournament, No. 5 Na Li of China cruised to a victory over U.S. player Christina McHale, 6-2, 6-0. No. 11 Kim Clijsters likewise made short work of her opponent, besting Daniela Hantuchova in straight sets of 6-3, 6-2. No. 8 Agnieszka Radwanska of Poland defeated Galina Voskoboeva of Kazakhstan, 6-2, 6-2.

For complete updates and coverage of the 2012 Australian Open, please stay tuned to SB Nation's tennis hub. For more on the Day 5 action, visit this StoryStream.