Manchester City manager Pep Guardiola said teams have changed tactics because they are no longer intimidated by his side and that is making the Champions League campaign more difficult. City are down in 25th place in the Champions League table, two points off the playoff spots, and Guardiola has noticed an increase in opposing teams adopting a man-marking approach. "Everyone came to the Etihad and stayed back," he told a press conference on Friday. "The first team I saw man-marking was Neil Warnock at Cardiff. Now everybody does it. Everybody comes here, it doesn't matter, man-to-man. "They just jump on (City's goalkeepers) Ederson or Stefan (Ortega). You have to adapt, you have to be better with the ball, otherwise you will not qualify for the Champions League." The Spaniard said while his side may have been outplayed by Paris St Germain in a 4-2 defeat on Wednesday, their problems were more about effective use of the ball than physicality. "Speed is important, but against PSG we ran more than they did," he said. "Our problem is with the ball. That is what we have been lacking this season.