Juan Martin del Potro can wrap up the tie if he beats Cilic in the first singles rubber on Sunday.

CNN: Bryan brothers give U.S. edge in Davis Cup quarters

And they will wrap up the tie on Saturday if Colin Fleming and Ken Skupski beat Ilhan and Haluk Akkoyun in the doubles.

BBC: Great Britain close in on Davis Cup victory

The Czechs can wrap up the best-of-five tie in Saturday's doubles rubber, which would set up a match with either France or Argentina.

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