I've used Dunlop Grand Prix Extra Duty Balls for a couple of decades. I started using them at USTA tournaments after noticing their performance and durability. I've been impressed by how consistent the performance is can after can. I did pull the string the last purchase and bought a full case, all good so far. I'd compare these to other brands as superior in general, but am impressed with the consistent quality. I was buying in packs of 4 from a large general retailer, running into flat, non-performing balls.

The balls keep pressure well and bounce great even after 4 hours of hard hitting.

The Dunlop Grand Prix Extra Duty tennis balls seem to last longer than the Extra Duty Penn balls.

Big fan of these balls. They hold their bounce, have a good weight and last nearly 3 sets. I went on a mission to find the best cost effective ball and this one takes it by far. Much better than the Penn and only $5 more than the other Dunlop for a case makes these well worth it. Much better better felt on the Grand Prix. If you want the best ball and want to spend less than $120, get these.

I think Dunlop Grand Prix Extra Duty Tennis Balls are the best for playing and lasting. Tennis point did a good job delivering them in a timely way.

The balls feel right. The right weight. The right bounce. And they last far better than Penn. I use them two weeks in a row without a problem. They cost more but I think they are worth it.

Great tennis ball for hard court

Durable, even bounce. Can last a couple hitting sessions on outdoor hard. Have not tried on indoor carpet

Finally a nice day outside to play and used two cans of the new Dunlop Grand Prix Extra Duty tennis balls and very disappointed with the style and product change Dunlop has made. Everyone please be ready for a huge change in the outer felt feel, look and play of this ball. Not the same heavy substantial playable tennis ball from the past. The balls felt feels thin to the touch and lighter in weight. The black logo print is ugly. Just don't understand why the change to what "was" a fantastic product. Here is the perfect example where change is not good. Same dollars, not same quality. Come on Dunlop...WHY???

They last the longest with the best durability of any ball I've use in the last 30 years.

longer lasting more quality play

These balls play the best. A bit heavier and livelier than the Wilson US Open. The fuzz does not fray. Great ball to use more than once.

I like that Midwest Sports has Dunlop Grand Prix tennis balls as I think these are the longest lasting tennis balls made.

A good ball, but not nearly as good as the discontinued Dunlop A Player Elite hard court ball which was not quite as hard and was more lively.

With same price range, these balls are not as good as Penn Pro. It last no more than an hour of playing while Penn Pro goes more than 3 hours.

Happy these balls outlast the Penns and Wilsons!

For years now I have been playing with the Dunlop Grand Prix tennis balls. They are simply the best balls I have found. They bounce higher, hold the felt longer and can be used more than once (if needed). A few years ago my daughter worked a summer job as a NJTL instructor. I filled her ball hopper up with the Grand Prix balls and they were still serviceable at the end of the year.. Wilson or Penn balls wouldn't have lasted.

Comparable to the Wilson US open balls but much cheaper. I'd buying 12 cans at a time, and it preserve well. Great durability for hitting/rallying up to 1 hour when regular Penn balls from Costco is only good for less than 30mins.

My friends like to play with already used balls. These last the longest for me.

I bought these for years and would play with nothing else......until the last case, maybe from 2011, where the quality went WAY down. Many of the balls were flat right out of the can, which was never the case before. In my experience this is a formerly top notch, very long lasting and very controllable ball (although heavier than most others,) gone to the dogs. And given that I've read the same thing from a majority of formerly happy reviewers on another major tennis website, continuing up through 2014, I'm a bit suspicious of the two 5 star reviews here. (3.5 player)

Sturdy well made

When I organized our group, we played with new balls every week. The new organizer wants to play with the same balls several times, so now it really matters to me that we play with these durable Dunlop balls.

These are great balls. I play with this type of ball everyday and I don't use anything else. They seem to hold the "pop" the longest of any other ball I have used.

These are great balls. I play with this type of ball everyday and I don't use anything else. They seem to hold the "pop" the longest of any other ball I have used.