By ESPNSTAR.com staff
A resilient Cagliari, led by an inspired performance by goalkeeper Michael Agazzi, were doing their best to earn a point at the Stadio Olimpico. Sau helped them grab a lead but Abdoullay Konko equalised the scores for the Biancocelesti eleven minutes before the end and the game looked set to end in a draw.
However, the game turned on its head when the Cagliari goalkeeper was sent off for a second yellow card after clashing into Miroslav Klose within the box. The decision was hotly debated as the goalkeeper seemingly had been the first to reach a long ball while the German got the barest of touches on the replay.
To add insult to injury, team-mate Andrea Cossu was also given his marching orders for protesting too strongly to the referee and Antonio Candreva made no mistake from the subsequent spot-kick opportunity.
Petkovic was quizzed as to the validity of the red cards but he maintains that the referee got the decision completely right. Furthermore, he was keen to point out that his side's determination to grind out a win was worthy of the three points.
"I didn't see the penalty incident from the bench, but there was certainly contact. The fact remains we played as a collective and reacted well to going behind," he told reporters in the post-match press conference.
"We didn't suffer that much other than a few opportunities. Even if we weren't that sharp tonight, we still created a great deal.
"It was a show of character, managing to fight back and turn around the result. The players always believe they can do it."
Meanwhile, Lazio have also been linked with a move for Bosman candidate Frank Lampard although president Claudio Lotito remained reticent when asked to provide information as to the club's intentions in signing the midfielder.
"Many players are linked with us, but we are always on the market for those who we believe can improve the potential of the squad," he told Sky Sport Italia.
"The newspaper stories are little more than bar talk. We only consider a player to be ours when we have registered his contract with the authorities.
"I won't say anything on Lampard, but just that when we look for a player, we usually get him."
He also confirmed that Mauro Zarate has been frozen out of the first-team squad after publicly revealing his desire for a move away from the club.
"I don't like players who set ultimatums," Lotito warned the Lazio players.