While Federer is a four-time champion in the California desert, Wawrinka has struggled in previous editions of the first Masters tournament of the year.
China and the US are now in close communication on arrangements for a meeting between the two presidents and exchanges at other levels, Chinese Foreign Minister Wang Yi said during his talks with US Secretary of State Rex Tillerson on Saturday.
Although he owns a commanding 19-3 record against Wawrinka, Federer said it wouldn`t necessarily be an easy match up against a player who has claimed three Grand Slam titles in the past three years.
Modeste`s stellar season continued with some clinical finishing as he needed just under 30 minutes to wrap up his hat-trick in Saturday`s 4-2 home win over Hertha Berlin, which left Cologne sixth in the table.
North Korea has tested a new high-performance rocket engine, the country's state media said on Sunday.
Earlier this week, Islam posted a video on her Facebook account slamming the Jammu and Kashmir Government for not providing the basic facilities to the Ali sports academy.
Fifteen corpses, three of them headless, have been found in a mass grave at a Venezuelan prison and more may be discovered, investigators said on Saturday.
The second edition of PSL was rocked by spot-fixing scandal, and the Pakistan Cricket Board (PCB) was forced to send back Sharjeel Khan and Khalid Latif from UAE, where the league games were played.
Last year Madrid managed to convince a number of national teams to release the likes of Gareth Bale, Luka Modric and Toni Kroos to miss friendlies in the March international break.