South Africa head coach Peter de Villiers has added an extra edge to tonight's clash at Wembley by accusing Saracens of "unethical" behaviour.

De Villiers criticised the Men in Black's director of rugby Brendan Venter for watching his players in a skills session in St Albans.

The controversial coach said: "I think it's unethical in any form of the game, if you know you are playing a team, you don't pitch up at their practice.

"They're our hosts, we don't want to be rude to them but there are certain things you don't do."

But Venter defended his actions by insisting the players he watched were the Test players and are not involved at Wembley.

Venter said: "This is the professional era, the club needs revenue and marketing, so I guess comments like Peter made are free advertising for us."