Tennis Courts at Rogers Park are getting a facelift.  City Councilman Duane Perkins questioned the overhaul after talking with workers, who told him they were implementing a system using wire tension for the cement.  Public Works Director Antonio Iadarola says it's a technology that's been embraced by people who maintain tennis courts, which require a lot of upkeep because of cracking. 

The infrastructure is put into the concrete and then pulled as it hardens, which locks it in place. Iadarola says it prevents cracking because there's constant tension in the slab.  The slabs are supposed to last 50 years or longer.  He says the key is not drilling in the slab, because if it's cut, the tendon will come flying out. 

The nets are pre-formed and installed before the concrete is put in.  Crews have already ground everything up and readied the site for the installation of underground wires.  The Public Works Department will also replace the lights at Rogers Park.