In the 2009 season, the club had many new and notable players in the country. Despite a successful start to the season, they pledged in April 2009 with Attaphol Buspakom a new coach. For the summer break, the association is, as expected by all experts, among the top five of the table and plays for the championship. One factor contributing to the club's success is its close relationship with Belgian club Lierse, and the acquisition of Thai star player Teeratep Winothai and Ronnachai Rangsiyo, the striker from PEA FC. Together with Teerasil Dangda, the club now has some of the most talented strikers in the country in its ranks. In 2010, Attaphol Buspakom was sacked following a string of unsuccessful results, and was replaced by Belgian René Desaeyere, who managed Muangthong for two seasons. Under his leadership, Muangthong qualified for the 2010 AFC Champions League. They beat SHB Đà Nẵng from Vietnam 0–3 but lost out to Singapore Armed Forces on penalties after the game ended in a 1–1 draw. They were eligible to play for the 2010 AFC Cup. They reached the semi-final round but lost to Al-Ittihad from Syria 2–1. In the 2010 Thai Premier League, they lost just three games out of 30, with seven draws, good enough to capture the league title for the second time. Dagno Siaka was the club's top scorer for in 2010 with 15 goals. At the start of the 2011 season Muangthong United signed former Liverpool player Robbie Fowler to a one-year contract. Muangthong United participated in the 2011 AFC Champions League play-off rounds. They played Sriwijaya but lost on penalties after the game ended in a 2–2 draw. They were also eligible to play for the 2011 AFC Cup, coming first in the group stage of the tournament. In their first match of the round of 16 they beat Al Ahed from Lebanon 4–0 but went on to lose to Kuwait SC in the quarter-finals round 1–0. After their tournament exit Henrique Calisto, the club's manager, was sacked and Fowler took over as player/coach of Muangthong United. In 2011 Thai Premier League Muangthong United finished the season in third place in Thai league. For the 2010–11 season and Teerasil Dangda is top score for club in 2011 season by 13 goals.