0 convincing win over Valencia on a balmy summer's night at Eastlands Saturday was not so much a pre-season friendly, more of a glimpse into the future. The scoreline was largely irrelevant for the crowd of over 27,000 who were more interested in seeing how Roberto Mancini's new-look side was shaping up after an investment of about 80 million pounds ($127.2 million) in the transfer window so far. That figure is likely to top 100 million pounds if James Milner joins the blue revolution from Aston Villa and the England midfielder will only add yet more strength to what is shaping up as a potential title-challenging squad. The opening goal came after 28 minutes when Jerome Boateng, recently acquired from SV Hamburg, surged down the right before crossing for Gareth Barry to head home after Valencia keeper Miguel Angel Moya misjudged the flight of the ball. City doubled the lead five minutes from time when Jo, who spent time on loan at Everton and Galatasaray last season, touched the ball into the net from close range after a burst forward from French midfielder Patrick Vieira. Jo also hit a post soon after coming on as a 74th minute substitute. It was his fourth pre-season goal and, although the fans might have wished for more, they had plenty to savour. All four of City's expensive close-season signings – David Silva, Yaya Toure, Aleksandar Kolarov and Boateng – all started and, although Mancini used 10 of his 13 substitutes, City showed touches of occasional brilliance and real emerging teamwork. High-scoring thriller Arsenal, playing without World Cup final stars Robin van Persie and Cesc Fabregas, came back from 3-0 down to defeat Polish side Legia Warsaw 6-5 in a roller-coaster pre-season friendly Saturday. Bayern claims 1st title World Cup stars Thomas Mueller and Miroslav Klose scored in the second half to lead Bayern Munich past Schalke 2-0 in the German Super Cup Saturday and give the Bundesliga champion its first title of the new season. Mueller, top scorer at the World Cup and its best young player, scored in the 75th minute with a simple shot into the empty net off a short pass from Klose. Klose collected a throughball that beat the offside trap and rounded Schalke goalkeeper Manuel Neuer. Klose completed the victory in the 82nd with an easy tap-in from close range off a feed from Ivica Olic. Bayern's World Cup stars started training only Monday after a vacation following the World Cup. Schalke's new striker Raul Gonzales, signed from Real Madrid, missed narrowly with a header early in the game. The Super Cup was revived after a 14-year break and pits the Bundesliga champion against the German Cup winner. Bayern won both titles last season and championship runner-up Schalke was picked as the challenger. Portsmouth loses opener After another offseason of financial turmoil, Portsmouth found no respite in returning to league action Saturday as its threadbare squad began life in the English second-tier by losing 2-0 to Coventry. Portsmouth, which was forced into financial administration as it was relegated from the Premier League last season, didn't even have a full complement of substitutes after offloading players on big wages. Portsmouth's former goalkeeper David James conceded three goals on his full Bristol City debut in a 3-0 loss to Millwall. The teams relegated with Portsmouth fared better, with Burnley beating Nottingham Forest 1-0 and Hull defeating Swansea 2