The latest grocery market share figures from Kantar Worldpanel in Ireland, show SuperValu managed to retain its position as the largest supermarket in the country for the 12 weeks ending 10 September.

The retailer grew its sales by 0.9% year on year – despite another strong performance from Tesco.

Deflation in the grocery sector eased slightly compared to last month to stand at 0.4%, although falling prices were not enough to stymie overall grocery market growth: up 2.3% year on year.

Commenting on the figures, Director at Kantar Worldpanel David Berry said: "SuperValu remains the largest grocer with a market share of 22.1%, although strong sales growth from Tesco – its highest since April 2012 – has helped narrow SuperValu’s lead to just 0.1 percentage point.

"Tesco saw sales grow by an impressive 4.3% during the past 12 weeks, compared to the same time last year. Although prices have fallen overall at the grocer, this has been countered by an increase in spending – the average shopper spent €15 more with Tesco than during the same period last year. As it celebrates its fifth consecutive period of growth, Tesco’s fortunes certainly seem to have shifted."

In third place, Dunnes Stores has held its share of the market steady at 21.6% year on year.

Among the low-cost retailers, Aldi and Lidl both increased sales year on year – up by 3.3% and 2.4% respectively.

Lidl held its market share steady at 11.8%, while Aldi grew market share by 0.1% to stand at 11.6%.