BRADENTON -- For the second straight day, Michael Mmoh was tested.
Mmoh passed. Again.
A test is what top-ranked junior boys tennis players get every time they step onto a tournament court.
"I've definitely noticed everywhere on the road that the guys are trying to step up. They're playing aggressive, and they're not playing scared," said Glenn Weiner, who has coached and traveled with Mmoh for the past year. "So a lot of these first few rounds in a lot of these tournaments, there have been struggles and I wish they were easier. But Michael handles them very well."
Mmoh turned away Liang Yu Richard Lin 6-4, 6-4, in the second round of the Eddie Herr International Junior Tennis Championships boys 18s division.
In the first round, Mmoh ousted qualifier Christian Sigsgaard in three sets.
Sigsgaard is ranked No. 217, while Lin is No. 116.
On Tuesday, Mmoh wore down the tenacious Lin with heavy serves and powerful groundstrokes. That recipe has Mmoh, seeded No. 2 in the boys 18s draw, moving to the third round.
The 16-year-old is ranked No. 13 in the ITF rankings and withstood Lin's pressure to deliver high percentages in first serves, winning first serves, second serves and winning second serves. He also had few unforced errors.
"Overall he played excellent," Weiner said. "This guy just really tested him."
Mmoh has started each of the past two years slowly, before racking up good tournament results late in the season.
This year, a nagging shoulder injury limited Mmoh's practice sessions, in particular with his serve, from January's Australian Open until Wimbledon in late June and early July.
Since then, he has continued progressing and recently captured the Grade A ITF in Mexico City.
That confidence has carried into the Herr, where he aims to win the boys 18s singles crown for the first time.
"It would be a huge victory for me because I train at IMG and Eddie Herr is such a prestigious tournament," Mmoh said. "... It would be winning Eddie Herr in front of all my friends here. It would be really special for me."
Only half of the remaining field played singles matches Wednesday, with the rest taking the court Thursday.
In the boys 12s, top-seeded Zane Khan defeated Alexander Gaponenko in straight sets. Khan, an American, won 6-1, 6-1, and has only lost three games in three victories.
America's Jaycer Calleros, who pulled a first-round shocker by downing the top-seeded boys 14s player, won again. He beat fellow American Drew Baird, 6-3, 2-6, 6-3, to advance to the quarterfinals.
Three seeded players, including No. 1 Sam Riffice, made it to the quarters in the boys 16s. Riffice needed three sets after losing the opener to progress.
The No. 1-seeded players in three of the four girls brackets advanced, too.
Japan's Himari Sato (12s), Anastasia Potapova (14s) and Catherine "CiCi" Bellis (18s) advanced.
Bellis and wild card Ingrid Neel, who also won Wednesday, meet in the third round in an all-IMG Academy student showdown.
The No. 1 seed in the girls 16s, Seira Shimizu, was eliminated in the first round earlier this week.