2017 Davis Cup World Group

The World Group was the highest level of Davis Cup competition in 2017. The first-round losers went into the Davis Cup World Group play-offs, and the winners progressed to the quarterfinals and the World Group stage of the competition in 2018.

Seeds
• # (first round)

• # (first round)

• # (quarterfinals)

• # (first round)

• # (first round)

• # (champion)

• # (final)

• # (semifinals)

Canada vs. Great Britain
Shapovalov defaulted the rubber and the tie after accidentally hitting a ball into the face of the chair umpire.