The Grand Slam winning No 8 signed autographs and met with fans at the store, which allows rugby fans to get their favourite WRU products at their local supermarket.
The store-in-store experience is expected to meet the demands of a fervent rugby culture in Wales following a fantastic season of international rugby.
From today fans can get their hands on the popular WRU 1881 leisurewear range in readiness for the upcoming season. The store will also feature the 2012 Grand Slam line and all the WRU's bestselling souvenir products.
"There's a great passion for Welsh rugby in Gwent and the fans here are really excited about the arrival of the range in Newport," said Faletau. "There are so many fantastic products to choose from and Tesco customers will find it easier than ever to get hold of all the best merchandise ahead of next season."
Head of Sales and Marketing Craig Maxwell said: "The WRU is delighted to be working in conjunction with Tesco stores to bring the brand closer to our fans. The store-in-store is the first of its kind and with the support of our loyal fans I hope that we can fulfil our long-term strategy to extend this exciting project throughout Wales."
Mark Grant, Tesco Senior Buying manager for Wales, said: ''We are delighted to be working with the WRU to bring their exciting range to our customers in Newport. We are confident that this rugby range is going to be very popular with our customers.''