Student or Learner
We can use there is no doubt that … when we are very certain about our opinion. We use it in formal situations:
- He’s never won Wimbledon, but there’s no doubt that he is a great tennis player.
I would like to ask if we can use "will" or "be going to" in the above sentence.
- He’s never won Wimbledon, but there’s no doubt that he will/is going to be a great tennis player.
Yes, you can.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.