P143 CEEFAX 143 Sun 22 Dec 16:45/47        DAVIS CUP FINAL, MUNICH The fourth rubber of the West Germany- Sweden final is building up into a real dog-fight between two of the world's greatest young players. With his side 2-1 down, Wimbledon champion Boris Becker took the first set from Sweden's Mats Wilander 6-3. French champion Wilander roared back with two breaks of sjrvj to level it for the holders 6-2, but Becker came out of a slump to win the third set 6-3 Becker's best may all bj in vain, however, with Sweden's Stefan Edbjrg a hot favourite to beat Michael Wjstphal. 