By Brian Homewood NYON, Switzerland, March 20 (Reuters) - Brazil's matches against Italy and Russia are billed as friendlies but could be an acid test for midfielder Kaka's hopes of playing in his fourth World Cup next year. Brazil coach Luiz Felipe Scolari, taking charge of his second match since being re-appointed in November, said on Wednesday that Kaka will be under the microscope as he continues to look for his ideal team for the Confederations Cup in June and next year's World Cup. ... More...