Australian golfers Anthony Brown and Michael Wright along with veteran Tsai Chi- huang from Chinese Taipei prevailed Thursday in taxing conditions on the opening day of the Indonesia Open. They fired five-under-par 67s at the Damai Indah Golf - Pantai Indah Kapuk Course in intense humidity and windy conditions. Brown started on the back nine and nailed seven birdies and two bogeys. With his wife expecting their first child in August, he is hoping for a good season. 'I did what I had to do and kept the ball on the fairway. I only missed two fairways. It was very tough out there as it was windy, very humid and the fairways are narrow,' said 27-year-old Brown. The Australian finished joint 10th in last year's Midea China Classic on OneAsia for one of his best results in Asia. 'It's good to get a good first round in here as I started the year quite well but over the past few months I just have not been scoring well,' said him. The more experienced Wright, 36, played in the group behind Brown in the morning and made an impressive eight birdies. 'We started early today so I thought we would have a chance to get the best conditions but it was hard going. I had a real up and down round but thankfully my putter saved me,' said Wright. Tsai was once a familiar name on leaderboards in the region, best-known for winning Taiwan PGA Championship 1998, Taiwan Open 1999 and Mercuries Masters 2003. 'It is nice to be playing well in such a big event. It has been a long time. I didn't make many mistakes but it took a lot of concentration,' said Tsai. The 42-year-old lost his form and confidence after his big wins and spent time teaching golf on a driving range in Shanghai before two memorable back-to-back comeback wins on the China Tour in 2008. Pre-tournament favorite Liang Wenchong from China carded a 70, former champion Thaworn Wiratchant of Thailand and Mardan Mamat from Singapore came in with 71. Idonesia Open is the fifth event on the burgeoning OneAsia which will stage 11 tournaments with more than 12 million U.S. dollards in prize money this season. 