Maurizio Sarri suggested Chelsea need to strengthen their forward line after a goalless draw with Southampton at Stamford Bridge on Wednesday.

"The club knows very well my opinion. I think we need something different for characteristics," he said. "I'm not in charge of the market. I have to try to improve my players, my team, my offensive phase, or better my offensive phase in the last 20 metres. The club knows my position, my opinion. It's up to the board. At the moment we're in trouble with the offensive players."