The six-time US Open champion Serena Williams is through to the fourth round in New York for the 19th consecutive time, dispatching Karolina Muchova 6-3, 6-2 in an hour and 14 minutes. Hitting 20 winners and 15 unforced errors, Serena had the upper hand on the court, saving two out of three break chances and delivering five breaks from eight opportunities to control the scoreboard and march into the last 16.
After three rounds, the American veteran should be pleased with the way she performed at home Major, winning six out of seven sets in dominant style and finding an extra gear against Catherine McNally in the second round to stay on the title course just a couple of weeks before turning 38.
Settling into a nice rhythm, Serena sailed through her service games and started to mount the pressure on the opponent ever since the third game, wasting the first three break chances before converting the fourth in the seventh game to move 4-3 up.
Williams cemented the break after saving a break point in the next game and closed the opener with a break at love following a return winner for a 6-3. Carried by this momentum, Serena held at 15 at the beginning of the second set and broke the Czech in game two after a double fault from Muchova who was drifting further and further away from the finish line.
Out of sudden, the Czech pulled the break back in game five after a volley error from Serena who stayed on her mission, breaking again in the next game to regain the lead and moving over the top with another break at 5-2 thanks to a forehand mistake from Muchova who couldn't pulled a surprise against an in-form rival who will now face the 22nd seed Petra Martic in the battle for the quarter-final.