[1] Chan was first selected to represent her country at the Singaporean leg of the 2010 FINA Swimming World Cup where, aged just 12, she competed in four events.

Swimming alongside Koh Hui Yu, Amanda Lim and Teo Jing Wen, the foursome won gold and the set the first Championship record in the 4 × 200-metre freestyle relay.

[6][7] Less than a month later, at the 2012 ASEAN School Games in Surabaya, Indonesia, Chan as part of the team that took out the 4 × 100-metre freestyle relay.

[9] During the Tokyo leg of the 2012 FINA Swimming World Cup, Chan set a personal best in the 50-metre freestyle of 26.46 seconds.

[16] She then teamed with up Samantha Yeo, Stacy Tan and Meagan Lim to come second in the 4 × 100-metre medley relay[17] and in the 4 × 100-metre freestyle relay, Chan with Yeo, Hoong En Qi and Rachel Tseng set a new national 17's record time,[18] bettering the previous record by 1.88 seconds.

Chan started 2014 by claiming three individual gold medals and a silver at the 2014 Southeast Asian Age Group Swimming Championships in Singapore.

Finishing 2.12 seconds behind Vietnam's Nguyễn Thị Ánh Viên, Chan stopped the clock at 2:04.44 inside the old championship record of 2:04.65 set by Benjaporn Sriphanomthorn of Thailand in 2011.

[19] In the 4 × 200-metre freestyle, Chan, Tseng, Chue and Jing Wen Quah smashed the meet record by over 9 seconds, lowering it to 8:30.84[26] and in the final event of the meet Chan with Tseng, Chue and Tan Jing-E just got home over Thailand in the 4 × 100-metre medley relay, posting a time of 4:20.25.

[31][32] One month later at the Glasgow Commonwealth Games, Chan competed in six events[2] before heading to the 2014 Summer Youth Olympics in Nanjing in August where she reached the semi-finals 50-metre butterfly[33] and the 50-metre freestyle.