Tata Motors has reported a 5% decline in the\u00a0global sales, including that of Jaguar Land Rover, which fell 21.6% in July. Sales of the luxury car -\u00a0Jaguar Land Rover - dropped\u00a021.6% in global retail sales at 36,144 units in July. However, the global sale of its commercial vehicles and Tata Daewoo in July were\u00a040,443 units, 29% higher than from a year ago. The drop in monthly sales of the company follows two major rating downgrades by Moody's and S&P. Moody's downgraded the corporate family rating on Tata Motors because of "weakening credit metrics" at\u00a0Jaguar Land Rover to Ba2 from Ba1. This was soon followed by a rating downgrade by S&P. The rating agency downgraded Tata Motors' rating to BB from BB+ due to operational issues\u00a0plaguing its cash-cow JLR and weakening volumes. However, both agencies retained stable outlook for the company. S&P said that sales of JLR could be falling due to the\u00a0Volkswagen dieselgate\u00a0emissions scandal, which made Europe\u00a0avert to diesel cars. Diesel cars accounted for over 30% of JLR's total volume in the financial year 2017-18. The global sales for all passenger vehicles were\u00a052,196 units in July, down 22% year-on-year, while global sales of JLR were\u00a035,007 units,\u00a0Jaguar wholesales were\u00a012,427 units, while\u00a0Land Rover sales were at 22,580 vehicles, the company reported.