Do you plan on renovating the kitchen when that tenant moves on or is it in good shape? If you plan on renovating the kitchen when the tenant eventually moves on and the tenant is not complaining I would place the funds in your cap ex reserve till the time comes.
If however, you have recently redone the kitchen I would probably go ahead and do the floor. With all that said it's hard to judge without seeing.
I actually got in to a disagreement about this with my mentor recently. He did not want me to renovate the kitchen or any of the floors in the house. But my thing was I got such a great deal on the house and I knew that Renters would pay a premium. He thought that I'd only be able to rent the place out for $1000 a month and because of putting in the new wood looking tile floors I'm getting an additional $400 a month. I was able to get the floors done at an hourly rate.. it worked out to be like $2.15 a sqft. Also, if I decide to sell it in a year or so its going to demand $$$$$$ Do what you think is right for your situation! Good luck my friend!
What kind of flooring is it? a 9" scratch is pretty small. You couldn't take up/cut out a piece from under the fridge or stove or closet and then do a repair and replace the hidden hole with something that doesn't quite match?