By Elvira Pollina MILAN (Reuters) – Telecom Italia (TIM) on Wednesday opened the door to a spin-off of its prized infrastructure assets, saying its newly appointed chief executive would explore options to create value for shareholders. Italy’s embattled former phone monopoly also said it would continue to study a takeover approach by U.S. fund KKR and compare it with possible strategic alternatives. TIM, which is wrestling with shrinking revenues in its hyper-competitive domestic market, on Friday named General Manager Pietro Labriola as CEO, its fifth boss in six years. Under fire after a str…