Filip Krajinovic asked questions of Roger Federer in the first set but the Swiss did not face a break point in the second.
World number one Novak Djokovic retained his perfect record over Bernard Tomic, advancing at the Miami Open.
Dominic Thiem lifts his first Masters 1000 title after stunning five-time champion Roger Federer in a thriller at Indian Wells.
Changes to the format of the Davis Cup have been approved by the ITF board, with an AGM set to determine whether they will be introduced.
The draw for the Davis Cup World Group play-offs has been held, with top seeds Argentina up against Kazakhstan.
The Australian bad boy is one of the great sporting enigmas, but an on-song Nick Kyrgios is a force to be reckoned with, according to Jim Courier.
Great Britain will have to cope without Andy Murray when they face France in the Davis Cup. "It's obviously a big loss," said Leon Smith.
The Davis Cup could be altered to a best-of-three-sets format, but Rafael Nadal believes those changes do not go far enough.