By Valentina Za MILAN (Reuters) -UniCredit has “limited” opportunities to reduce its exposure to Russia, the Italian bank’s finance chief said on Wednesday, ruling out providing further support for the Russian subsidiary while emphasising it was not a financial drain on the group. UniCredit continues to assess options to reduce its exposure “at the right conditions” with a fully dedicated team, Chief Financial Officer Stefano Porro said. “We’re looking at all potential options at a defensible price,” he said, adding that the Russian business contributes liquidity to the group. “We’re (a) net b…