Contepomi and Wilkinson built a close relationship based on a deep mutual respect during their time playing together for Toulon in the French Top 14.
The Argentina captain and former Leinster fly-half will link up with his new club Stade Francais after the World Cup.
Contepomi is relishing the opportunity to line up opposite Wilkinson when the Pumas open their Rugby World Cup campaign against England in Dunedin.
"To play against him will be a huge honour - but we try to analyse England as a whole and not only as one player," said Contepomi.
"It's a great honour to have had the possibility to play with him, to train with him.
"He is one of these players that does not come around that often.
"Obviously I have a great respect for Jonny, for me one of the best players in the world - and a great man and that makes him even better.
"For me to be here in New Zealand, to be able to play a World Cup in one of the proudest rugby nations in the world, is a great honour."
Argentina have played just one Test in the last 11 months - a defeat to Wales in Cardiff - and there is a danger they could be rusty.
But France under-estimated the in the opening game four years ago, when the highly-charged Pumas picked off their hosts on a dramatic night in Paris.
Argentina went on to finish third, giving the sport a vital shot in the arm and laying the foundations for their inclusion in a new Four Nations tournament with Australia, South Africa and New Zealand from next year.
"We have to play England in the first game, one of the favourites for the tournament, but it does not matter who is the opponent," said Contepomi.
"It's a huge occasion for anyone to play a World Cup. When it comes to a World Cup, Argentinian people are very proud of their team.
"Rugby has come a long way in popularity so lots of people will be watching. It's great for our sport in our country.
"We want to go as far as in the last World Cup - or even further."
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.