MOSCOW, Sept 8 (Reuters) - Russia’s gross domestic product (GDP) will grow by at least 4.2% in 2021, Economy Minister Maxim Reshetnikov said at a Moscow forum on Wednesday, raising the ministry’s previous forecast of 3.8% growth. “Our revenues are growing, we are improving our forecasts,” Reshetnikov said. “The economy is recovering.” (Reporting by Darya Korsunskaya; Writing by Alexander Marrow; Editing by Jon Boyle) Our Standards: The Thomson Reuters Trust Principles.