Federer, Nadal advance

Roger Federer and Rafael Nadal — playing back-to-back on stadium court on the 13th anniversary of their very first match — both advanced Tuesday to the quarterfinals of the Miami Open, surviving strong tests in both cases. Stan Wawrinka wasn’t as fortunate, the No. 1 seed getting bounced on his 32nd birthday by teenager Alexander Zverev. Kei Nishikori also survived a three-setter to reach the quarters. The No. 4-seed Federer outlasted No. 14 Roberto Bautista Agut 7-6 (5), 7-6 (4), the No. 5-seed Nadal got past Nicolas Marut 6-4, 7-6 (4), and Nishikori — a finalist at Key Biscayne a year ago — rallied from a break down in the final set to beat Federico Delbonis 6-3, 4-6, 6-3. Zverev, who turns 20 next month, downed Wawrinka 4-6, 6-2, 6-1, and showed no ill effects by playing just 24 hours after winning a three-setter over John Isner that went entirely to tiebreakers. Karolina Pliskova, who has never found Miami exactly to her liking, got into the women’s semifinals with a 6-3, 6-4 victory over 26th-seeded Mirjana Lucic-Baroni.

Davis Cup team set

Jack Sock, John Isner, Sam Querrey and Steve Johnson will represent the United States against host Australia in the Davis Cup quarterfinals on April 7-9. U.S. captain Jim Courier announced his roster Tuesday. Australian captain Lleyton Hewitt’s squad is Nick Kyrgios, Jordan Thompson, Sam Groth and John Peers. No. 16 Kyrgios and No. 17 Sock are the only players on either team ranked in the ATP’s top 20. The best-of-five series will be played on an outdoor hard court in Brisbane. The U.S. leads Australia 26-20 in their Davis Cup meetings, including a victory by the Americans in last year’s first round.

Nadal not on team

Rafael Nadal will not play in the Davis Cup quarterfinals when Spain faces Serbia next week. The 14-time Grand Slam champion was not on the team announced by Spain captain Conchita Martinez on Tuesday. No reason was given. Also absent was Spain’s second-ranked player, Roberto Bautista Agut. Spain will be led by world No. 19 Pablo Carreno Busta, who will be joined by Albert

Ramos-Vinolas, Marcel Granollers and doubles specialist Marc Lopez. Spain and Serbia will play April 7-9 in Belgrade.