BERLIN, Jan 13 (Reuters) - Germany international Tim Borowski will join Bayern Munich when his contract with Werder Bremen expires at the end of the season.Werder said in a statement on Sunday that midfielder Borowski had rejected the offer of a new contract and would instead move to rivals Bayern, where he will be reunited with his former national team coach Juergen Klinsmann. 'It's a shame,' coach Thomas Schaaf said. 'We would have happily carried on working with Tim.' Borowski, 27, was part of the Germany squad that Klinsmann led to third place at the World Cup on home soil in 2006. Bayern announced on Friday that Klinsmann would return to the Bundesliga to take over as their coach as of July 1.