Renter's dog destroyed lawn that was professionally installed by landscape company

[Sara Valentine]

I have a renter moving out of a nice house with a very small back yard. His dog has completely destroyed the small lawn, which was professionally landscaped. Renter wants to replace the lawn himself. The lawn that was destroyed was professional landscaped.  I want the lawn back in the shape it was when the tenant moved in 2 years ago - so I would prefer to take the money out of his deposit, in order to have it professionally done.  I have concerns that renter will not do whatever is necessary to remove and replace the soil which was saturated with dog urine. Plus it takes 6 weeks for new sod to establish (for roots from sod to grow into the ground). So we wouldn't know for six weeks if the re-sodding will be successful.  Meanwhile he's going to be wanting his deposit back. Am I in my rights to say it must be done professionally?  THANKS SO MUCH IN ADVANCE FOR ANY ADVICE!