Anderson then took out Tim Ambrose's off-stump and removed 17-year-old Ateeq Javid and Rikki Clarke in a three-over spell to complete his five-wicket haul and confirm his sharpness for the Ashes.
The 62-year-old insisted he will still end his second spell at Ibrox in May after being persuaded to complete one more year with the Glasgow club at the end of last season.
Should Boruc complete his protracted switch to Italy, it would end a five-year spell in Scotland, during which time he won three championships and twice helped Celtic into the last 16 of the Champions League.