KARACHI (Reuters) - In the currency market, the rupee ended lower at 84.40/84.45 to the dollar compared with the previous days close of 84.23/28. Dealers said dollar buying for import payments, especially for oil, pushed up the demand for the U.S. currency. As anticipated, there has been a rise in dollar demand over the last few days and this is likely to continue in coming days as well, keeping the rupee under pressure, said a dealer at a foreign bank. The rupee fell to an all-time closing low last month but gained sharply to hit a four-month high last week. In the money market, overnight rates ended flat at 9.50 percent. Dealers said there were outflows of 62 billion rupees on Saturday, when the central bank is likely to conduct a reverse-repo to inject funds into the market. The amount to be injected would probably be lower than the outflows, as there is still some liquidity scattered in the market, said a brokerage house dealer.