"However, we expect dovish rhetoric at the press conference from ECB President Mario Draghi to keep a December move in play. We would therefore recommend using any EUR rally as a better entry level to re-engage in EUR/USD downside."
Against the yen, the euro eased 0.1 percent to 133.10 yen, having fallen as far as 132.60 on Friday, its lowest in three weeks.
Pressure on the euro helped lift the dollar to a six-week high versus a basket of major currencies. The dollar index rose to 80.930, its highest level since Sept. 18. It last stood at 80.769, up 0.1 percent on the day.
The dollar index is now testing resistance at 80.835, the 50 percent retracement of its drop from early September to late October.
The dollar was little changed against the yen at 98.76 yen. Trading activity in the dollar versus the yen is likely to be subdued in Asia on Monday with Japanese markets shut for a public holiday.
The Australian dollar edged higher, supported by stronger-than-expected Australian retail sales.
(Read more: Aussie dollar could tumble 25% by 2016, warns SocGen)
Another factor supporting the Aussie dollar was upbeat Chinese data on Sunday showing activity in China's services sector expanded at the fastest pace in 13 months in October -- a further indication the world's No. 2 economy has stabilized.
The Australian dollar rose 0.4 percent to $0.9480, edging away from Friday's three-week trough of $0.9421.
Up next for the Australian dollar is the Reserve Bank of Australia's policy meeting on Tuesday. All 23 analysts polled by Reuters on Friday expect the RBA to keep its cash rate unchanged at a record low 2.5 percent.