I am not able reopen a sprint

[lakshay.batra]

I am not able to reopen a sprint, it was closed by mistake.

The sprint is not coming in sprint reports 

[Bill Sheboy]

Hi @lakshay.batra -- Welcome to the Atlassian Community!

One potential cause for this issue is that an issue in the sprint is no longer included in the board's filter, and so the sprint cannot display.  To check that, 

• Navigate to issues and filters and search for your closed sprint, noting the issues in it
• Using your board's filter, check if all of the sprint issues would be included

To fix it, adjust your board filter temporarily to include the missing issue, reopen the sprint, and then decide how to proceed.

If this does not help, I recommend submitting a support ticket with Atlassian: 

https://support.atlassian.com/

Best regards,

Bill