Liverpool manager Roy Hodgson admitted his side now face a testing trip to Turkey next week after a gaining a slender advantage over Trabzonspor.
Ryan Babel scored the only goal as the Reds beat the Turkish Cup winners 1-0 in the first leg of their Europa League play-off at Anfield.
"We probably did deserve the extra goal which would have made the trip to Turkey more comfortable. Now it won't be comfortable at all," said Hodgson, who made seven changes and gave captain Steven Gerrard a night off.
"I think with our second-half performance we can probably count ourselves unlucky,"
Victory would have been much more comfortable had Joe Cole converted a second-half penalty and debutant Christian Poulsen not had a goal disallowed.
"If you miss a penalty you can't blame anybody but yourselves but I thought we were unlucky with the disallowed goal," added the former Fulham boss.
"Overall I am very pleased with the result and performance, especially second half, but whether it will be good enough to take to Trabzonspor, only time will tell."
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