– Roger Federer and Rafael Nadal stayed on course for a blockbuster Swiss Indoors final clash on Friday after battling through tough three-set quarter-finals. Top seed and six-time champion Federer held off David Goffin 6-3, 3-6, 6-1 to win a re-run of his 2014 final victory over the Belgian. Nadal, the third seed, scored a hard-fought 4-6, 6-3, 6-3 triumph over Marin Cilic, his third three-set victory this week. Nadal, the 14-time Grand Slam champion, will next face France’s Richard Gasquet. The 29-year-old Nadal’s confidence is fast returning after a slow start to 2015. …