When it comes to world No. 1 Roger Federer's opponents at the AIG Japan Open, the bigger they are the harder they fall.

Top seed Federer downed No. 14 seed Benjamin Becker 6-3, 6-4 in the semifinals on Saturday and will play Tim Henman in the final at Tokyo's Ariake Colosseum on Sunday.

On Friday, Federer was on the ropes against world No. 1,078 Takao Suzuki before scraping a 4-6, 7-5, 7-6 (7-3) win and survived a scare against Serbian qualifier Viktor Troicki earlier in the tournament.