Federer will return to court for the first time since his Rotterdam Open success last month for the Match For Africa 5: Silicon Valley charity event on Tuesday.
The Swiss star will play a three-set singles match against Sock before a one-set doubles match with Microsoft co-owner Bill Gates.
NBC Today Show co-host Savannah Guthrie will partner Sock as their opponents and the match is expected to get underway at 3.30am GMT.
The exhibition event takes place at the SAP Centre in San Jose and the money raised will go to children living in poverty in six different countries in southern Africa and Switzerland.
The Roger Federer Foundation has linked up with the event which has previously seen Rafael Nadal, Stan Wawrinka, Andy Murray and John Isner all take part.
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“I believe in the power of people,” Federer writes on the foundation’s official website.
“They might only need some initial empowerment.
“We know that a good education empowers children by allowing them to take their future into their own hands and play an active part in shaping it.
“And we trust in the best will of parents that they want to ensure the best possible opportunities for their children.
“For more than 12 years my foundation has therefore been committed to enable parents and local communities in providing these children with the opportunity for a good education.”
“We aim to reach a million children by 2018.”