UPDATE 1-Russian rouble nears 4-week high versus dollar, euro

The rouble strengthened to a near four-week high against the dollar and euro on Friday, supported by month-end tax payments that boost demand for the Russian currency, while shares in fertiliser producer Phosagro surged after strong results. Against the euro, the rouble gained 1.4% to 59.35 , also reaching a near four-week high of 58.5325 during the session. The rouble is set to see support from month-end taxes that usually prompt export-focused companies to increase conversion of their foreign currency revenues to meet local obligations.