The dollar was under pressure on Friday and was poised for its worst weekly performance for the year, as investors waited on a key U.S. jobs report that is expected to back expectations for a near-term Federal Reserve rate cut to support a slowing economy. Not helping the U.S. currency was the European Central Bank's policy review on Thursday where it refrained from hinting at an interest rate cut and instead pushed back the timing of its first rake hike since the 2008 financial crisis.