The phrase "left in doubt" is correct and can be used in written English.
It is often used to describe a situation where something is unclear or uncertain. Here is an example: "After reading the confusing instructions, I was left in doubt about how to properly assemble the furniture."
The outcome further muddled the heavyweight division and left in doubt what will happen next.
As a player you could never go on court with anything left in doubt.
Left in doubt are many of the largest issues facing state government.
Thousands of jobs have been lost, companies forced to close, projects mothballed or abandoned, and future developments left in doubt.
No foreign arriviste can be left in doubt: New Jersey sets a standard for the world in observing the preferred 9.15 hand position on the steering wheel.
By the Treaty of Amiens (1279) the Agenais, whose status had been left in doubt when Alphonse of Poitiers died, passed to Edward I of England, who also had unsettled claims in Quercy.
In Moscow, President Vladimir V. Putin still appears to be rearranging his most senior officials, leaving in doubt who is in charge of working with the United States.
The Northeast has been home to the loudest opposition, with fierce challenges from property owners and state officials in New Jersey and New York leaving in doubt two major natural-gas projects.
All quickly changed their laws to conform to Apprendi, leaving in doubt the status of those inmates who had previously been sentenced to death.
The Security Council vote leaves in doubt the future of a 300-member United Nations mission in Syria that was sent to monitor the peace plan, which was negotiated by Kofi Annan, the special envoy of the United Nations and the Arab League.
Efforts to do something about it have never gained traction, leaving in doubt whether members of Congress and their well-informed staff advisers are subject to laws governing insider trading or free to profit from it.
