The Wales skipper made his first return to action after his controversial red card, which saw him banned for three weeks, for a dangerous tackle on France's Vincent Clerc in the World Cup semi-final in New Zealand.
But while all eyes may have been on Warburton's return, Warren Gatland, the Wales coach, would have been concerned at the sight of centre Jamie Roberts leaving the field in the 11th minute with a groin injury ahead of the visit of Australia to the Millennium Stadium next month.
The Blues, who welcomed back Warburton's fellow Wales World Cup stars Roberts, prop Gethin Jenkins, lock Bradley Davies and young scrum half Lloyd Williams, earned themselves a well deserved victory in Colombes.
But the game was marred by an injury in the second minute to lock James Down who picked up a horrific broken leg at the tackle area and was stretchered from the field before being replaced by Paul Tito.
Racing, who were without four injured stars of their own, never really got a real foothold in the game.
It took Cardiff a while to recover from the shock of Down's injury and they found themselves 6-0 down to a penalty by full back Gaetan Germain and an outrageous drop goal by fly-half Juan Martin Hernandez.
But when the visitors did strike, it led to the game's first try. Tito was tackled into touch just short of the Racing line after a slick handling move but from the lineout, Tongan prop Tau Filise picked up the loose ball for an easy try.
Fly half Dan Parks added the conversion to put the visitors a point ahead before the Scot and Germain swapped penalties to give the Blues a 10-7 lead midway through the first half.
Racing soon restored their lead after some Hernandez magic bewitched the Blues defence to put his fellow Argentinian Juan Imhoff over for a try in the corner for the side from the French capital.
But just before the break the visitors crossed for their second try after a counter-attack led by full back Chris Czekaj saw impressive rookie wing Alex Cuthbert sneak in at the corner to make it 17-14 to the Blues at half-time.
After the break, Parks and Germain swapped penalties during a cagey second half but the Welsh region never looked in danger and hung on for a deserved victory to put themselves in the driving seat for qualification from Pool Two.
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.