Deputy Public Prosecutor Ng Yiwen told the court the woman felt someone pushing her from behind in the metro coach, which she boarded at Singapore's Kembangan station on March 16.
She, however, did not pay much attention, The Straits Times reported. Soon, the same thing happened again. When she turned around, she saw a man standing behind her, who was later identified as the Indian software professional.
When the train arrived at City Hall station in Singapore's Central Business District, the man got out and walked away to the opposite platform, while the woman continued to Tanjong Pagar.
The convict's lawyer Ravinderpal Singh said his client realised his action was wrong. The prosecutor then sought at least a six-week jail term, saying a deterrence sentence will discourage him from committing such offence in future.
District Judge Samuel Chua backdated the accused's sentence to July 13.