German giants Borussia Dortmund have confirmed their negotiations with Arsenal out-of-favor goalkeeper Jens Lehmann. "In my view it was a very positive chat. Jens said he would think about (the offer), but also asked that he not be put under pressure to make a decision, which is fine by us,” Borussia's managing director Hans-Joachim Watzke told Skysports.com. "I don't know when a decision will come, but I can say that we are cautiously optimistic about both the talks and the decision." Lehmann lost his place in the Gunners line-up for Manuel Almunia who became the number one choice for manager Arsene Wenger. The 38-year old goalie has confirmed many times that he wants to have regular football in order to secure the number one jersey with Germany in next summer's Euro 2008.