Andy Murray said he was angry with himself after losing to Diego Schwartzman in Antwerp.
Murray headed into the match looking in good shape after coming through an epic clash with Frances Tiafoe in the first round.
However, he failed to hit anything like those heights against Schwartzman and he said much of that was down to his decision-making on court.
“Mentally, today I was poor,” Murray admitted. “My attitude was poor on the court and those are two things you can control.
“If they’re not there, that also will make the decision-making harder.
“You’re not going to get every single [decision] right in the match, but you also have to be present enough to acknowledge what is actually happening in the points and why you are winning and losing points.”
Andy Murray has a busy end-of-year planned, but he says he is yet to hear whether he will be granted a Paris Masters wild card.
Even if he doesn’t get one, though, he plans to play the event.
“There’ll be a decision on the final Paris wildcard on Monday, but I might even play the qualifiers there,” he said.
“Sport is a results business. Play well or poorly doesn’t really matter if you lose matches. You need to be winning. That’s what I want in the last few tournaments.
“They are really strong tournaments and there are no guarantees the results will come, but I want to win more matches.”
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