https://phys.org/news/2018-07-road-block-uber-grab-singapore.html

But Singapore's competition commission found that the deal created a virtual monopoly in the city-state's ride-hailing market, with Grab raising prices after the merger was completed, it said in a statement.

The Competition and Consumer Commission of Singapore (CCCS) criticised both companies for going ahead with the "irreversible" deal despite restrictions imposed in March to pause the transaction while an anti-competition probe was underway.