The Indian Aces are the only team in the International Premier Tennis League (IPTL) that's still undefeated. They improved to 2-0 on Saturday with a victory from Japan over the Singapore Slammers, a team that is now 0-2. The contest was incredibly close, however the Aces prevailed with a Set-5 victory from Kirsten Flipkens. The Aces will now look to complete the opening weekend 3-0 with Roger Federer to join the team down the road still.

Federer to join Aces later this month

According to the detailed match schedule at the IPTL's home page Federer will represent the Indian Aces in Hyderabad on December 10th.

Between now and then the best men's player on the Indian Aces is Feliciano Lopez. The Spaniard pulled double duty in the match on Saturday against the Slammers, beating Marcos Baghdatis in singles 6-4 but losing in doubles by the same score partnered with Ivan Dodig.

Other IPTL action saw Kei Nishikori make a timely debut at the event. Japan's top player, playing in front of a partisan Japanese crowd, represented the Japan Warriors. He played the 5th set of their 2nd match against the UAE Royals, paired against Tomas Berdych. Nishikori won the set 6-1 to give the Warriors an overall 23-20 victory as both teams are now 1-1 in league play.

On Sunday the Warriors will face the Slammers with Nishikori expected to represent his team again.

The Slammers do have Nick Kyrgios there so that could be the marquee showdown in men's singles. The Indian Aces will face the Royals with Lopez possibly facing Berdych. However, the event is such that it allows substitutions along some lines so it's not possible to predict who will play who with certainty.

Serena Williams to join Slammers soon

Federer is one big name that is expected to play in the late-fall league later this month. Serena Williams is another as she is expected to be in Singapore on December 6th. She's the top-ranked women's player involved with the event and is on the detailed match schedule when the Slammers face the Warriors after the weekend.

At that point, Nishikori will no longer represent the team, perhaps making them easier pickings than they were on Saturday. His next expected action after the IPTL moves from Tokyo will be at ATP Brisbane.

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