GROUPON in Houston has a deal today for $10 for One General-Admission Ticket ($20 Value) to any Sunday match at The Houston Polo Club
If you are new to Groupon, it is easy and fun to use. After you buy the deal, your voucher code will be ready in about 24 hours. Then go to Groupon, log in, click on your name in the upper right and a drop down will appear. Click on "My Groupons" to get the voucher.