Blackstock shot wide in the final seconds of the half with the Americans off-balance in their end.
‘‘It was ugly, real ugly,’’ U.S. captain Carlos Bocanegra said. ‘‘It’s three points and sometimes in CONCACAF it’s like this, so on Tuesday night we'll go out there on the front foot and get a win hopefully.’’
NOTES: Johnson now is tied for second-most goals for the U.S. in qualifying games with Brian McBride. ... Substitute midfielder Jermaine Jones drew a yellow card for a hand ball and is suspended for the Guatemala match. ... Bradley returned to the lineup after missing the prior two qualifiers with a muscle injury. ... This was the first time Antigua and Barbuda hosted the U.S.