Defending champion Real Madrid can take full control of its group with a home win against Shakhtar Donetsk on Wednesday. A victory would give Madrid a five-point lead after only three matches in Group F, considered one of the easiest. Madrid got off to a perfect start to the season in all competitions but was held 1-1 at home against Osasuna in the Spanish league on Sunday. Madrid has six points — two more than second-place Shakhtar. Madrid’s big rival, Barcelona, isn’t in such good shape after losing to Bayern Munich last time out. Barca visits Inter Milan on Tuesday in a match that could help decide the second-place qualifier in Group C, with both teams on three points, three behind Bayern.