The phrase "tremendous team" is correct and usable in written English. It is an adjective phrase used to describe a group of people who have achieved something impressive, and can be used in a variety of contexts. For example: "The company thanked their tremendous team for all of their hard work to complete the project on time.".
They lost, after a tremendous team effort.
"So yes, Eli has been a tremendous team player.
'It shows we have a tremendous team,' Wenger said.
It was made by a tremendous team and I can't praise them enough".
Southern California built tremendous teams around Cheryl Miller.
"She built a tremendous design team," Ms. Collinson added.
Scarborough said his players were "chasing the game against a tremendous youth team".
Being a terminologist, I care about word choice. Ludwig simply helps me pick the best words for any translation. Five stars!
Maria Pia Montoro
Terminologist and Q/A Analyst @ Translation Centre for the Bodies of the European Union