Chelsea are set to announce signing Germany captain Michael Ballack on Monday, the Premiership champions said. "Chelsea Football Club and Michael Ballack will conduct a press conference on Monday, May 15 at Stamford Bridge," the club said in a statement on their website. The club didn't mention further details over the financial terms or the period of the contract. Ballack has been linked with a move to the Premiership since January but both the Bayern Munich playmaker and Chelsea denied the reports. The 29-year-old joined Bayern after the 2002 World Cup and led the Bavarians to three Bundesliga titles and a simillar number of domestic cups.