Thiem tumbles in Montreal opener

Dominic Thiem has for the second week running fallen from a winnable position on North American hard courts.

The Austrian, seeded third in Montreal, fell to a 6-4 6-7(7) 7-5 loss to Argentine Diego Schwartzman in the second round of the ATP Masters event.

Thiem led 5-2 in the final set and held four match points in three separate games before things unravelled, handing Schwartzman his first ever top-10 win in 14 attempts.

And 0-7 vs top 10 in 2017 via @pqcarvalho

— José Morgado (@josemorgado) August 9, 2017

In his previous match last week in Washington DC, Thiem served for the match against Kevin Anderson and held a match point in the final set tiebreak before going down.

On Tuesday in Montreal, he held two match points in the eighth game before Schwartzman held for 3-5, blew another in the next game as he served for the match, and missed a fourth in 10th game before world No.36 levelled the set.

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Schwartzman ultimately rattled off five straight games to complete a stunning comeback; Thiem finished the match with 28 winners yet an unsightly 67 unforced errors.

A warrior effort from Diego Schwartzman gets him past Dominic Thiem for the first time. #CoupeRogers pic.twitter.com/lXfqyLDQVn

— Tennis TV (@TennisTV) August 9, 2017

He next faces Jared Donaldson in an all-unseeded third-round match.