Anderson, Johnson Advance at Winston-Salem

WINSTON-SALEM, N.C. — Second-seeded Kevin Anderson of South Africa and No. 13 seed Steve Johnson of the U.S. were among four seeded players to advance Wednesday to the quarterfinals at the Winston-Salem Open.

Anderson, ranked 15th in the world, beat 2014 finalist Jerzy Janowicz of Poland 7-6 (2), 6-4 at the Wake Forest Tennis Center.

Johnson, the lone American remaining, topped third-seeded Jo-Wilfried Tsonga of France 6-3, 4-6, 7-6 (4).

In a battle of big hitters — both players are 6-foot-8 — Anderson served 17 aces and took advantage of a service break in the second set to improve to 3-0 against the 16th-seeded Janowicz.

"I was really pleased with today's performance," Anderson said. "It was…