After their partnership ended, Tran competed one season with Natasha Purich for Canada.

[6] In 2007, Richard Gauthier was searching for a pair skating partner for Japanese skater Narumi Takahashi.

Bruno Marcotte recommended Mervin Tran, who agreed to come to Montreal, Quebec for a tryout.

[7] Takahashi/Tran made their international debut on the 2007–08 ISU Junior Grand Prix series, placing 12th and 6th at their events.

They won the bronze medal at their second event, qualifying them for the 2008-2009 ISU Junior Grand Prix Final, where they placed 7th.

They also won their first medals on the senior Grand Prix series, a bronze at 2010 NHK Trophy, and then silver at 2010 Cup of Russia.

During the 2011–2012 season, Takahashi/Tran placed fourth at their first Grand Prix assignment, the 2011 Skate Canada International, and then won the silver medal at their second event, 2011 NHK Trophy.

[18] As a result, the pair withdrew from their Grand Prix events, the 2012 Cup of China and 2012 NHK Trophy.

[19][20] On March 12, 2013, Tran announced he had teamed up with Natasha Purich to compete for Canada.

On June 10, 2014, it was announced that Tran and the United States' Marissa Castelli had formed a partnership which would train mainly in Montreal under Bruno Marcotte and to a lesser extent at the Skating Club of Boston under Bobby Martin.

[22][23] It was also announced that he was awaiting release from Skate Canada, indicating that they might compete for the United States.

[24] After winning bronze at the 2016 CS Autumn Classic International, the pair appeared at two Grand Prix events, placing 7th at the 2016 Skate America and 5th at the 2016 Trophée de France.

Due to the COVID-19 pandemic affecting international travel, Serafini/Train were assigned to the 2020 Skate America, attended only by pairs training in the United States.