MOSCOW, July 19 (Reuters) - The rouble weakened on Monday, retreating from the 74 threshold versus the dollar it hit in the previous session, as oil prices fell after OPEC+ overcame internal divisions and agreed to boost output, also pushing Russian stocks lower. At 0751 GMT, the rouble was 0.3% weaker against the dollar at 74.31, creeping towards a one-week low, and had lost 0.1% to trade at 87.58 versus the euro. Oil prices were lower after OPEC+ ministers agreed on Sunday to increase oil supply from August to cool prices which have climbed to 2-1/2 year highs as the global economy recovers from the coronavirus pandemic. Brent crude oil, a global benchmark for Russia’s main export, was down 1.3% at $72.61 a barrel. “Despite the local drawdown, we view the increase in Russia’s oil production quota as positive for the rouble in the medium term,” said Promsvyazbank analysts in a note. Russia and other emerging markets may see continued pressure from hesitancy over the global economic recovery, despite the U.S. earnings season so far exceeding expectations, BCS Global Markets said in a note. The rouble does have the support of a month-end tax period which usually prompts export-focused companies to convert revenues in foreign currencies into roubles and expectations of a rate hike by the central bank later this week. Governor Elvira Nabiullina said last month the board may consider raising rates from 5.5% by 25-100 basis points at its July 23 meeting to rein in inflation. Russian stock indexes were at their weakest since late May. The dollar-denominated RTS index was down 1.1% to 1,584.9 points, earlier touching its lowest since May 25. The rouble-based MOEX Russian index was 0.% lower at 3,739.2 points, its weakest since May 31. For Russian equities guide see For Russian treasury bonds see