Add 'the' before IPL.
Student or Learner
"There weren't a lot of matches in IPL, in which people got to see a lot of sixes and fours being hit".
Remove the comma.
It's a little messy. I would probably change the word order and say something like "In the 2015 IPL, there weren't many matches with a lot of sixes and fours". I can't see that it's important whether or not people saw sixes and fours being hit - the important thing is whether or not they happened.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.
Correction for post# 1.
"There weren't a lot of matches in the IPL in which people got to see a lot of sixes and fours being hit".