BERLIN — Real Madrid faces a tough test at Galatasaray as it chases its first Champions League win of the season. Madrid is in last place in Group A after losing 3-0 at Paris Saint-Germain before barely saving face in a 2-2 draw with visiting Club Brugge. Coach Zinedine Zidane’s preparations are far from ideal for Tuesday’s game in Istanbul after his heavily rotated squad surrendered its Spanish league lead on the weekend in a 1-0 loss at Mallorca. Group leader PSG visits Bruges as it bids to maintain its perfect start. Also Tuesday, Tottenham is aiming to bounce back from its humiliation at the hands of Bayern Munich with a win over visiting Red Star Belgrade, and Italian newcomer Atalanta faces a trip to English champion Manchester City On Wednesday, defending champion Liverpool visits Genk in its first game since its perfect start to the Premier League was ended with a 1-1 draw at Manchester United, and Borussia Dortmund visits Inter Milan. Here’s a closer look at the eight groups: GROUP A Last season’s worries were supposed to disappear after Zidane returned to take over Madrid’s dysfunctional team. But the problems have continued through an expensive summer rebuilding campaign…