Fabio Gruber, a 23-year-old centre-back from 1. FC Nürnberg, is of interest to several Bundesliga clubs. In addition to Borussia Mönchengladbach, FC Augsburg is also closely monitoring his development. According to a report by 'Bild', the most concrete interest at present is from 1. FSV Mainz 05. The Peruvian international, who also holds German citizenship, is under contract with Nürnberg until at least 2028, though a transfer in the summer is becoming more probable. The 'Bild' report also states that his contract lacks a release clause and that there is an internal belief at his club that retaining him will be difficult. Gruber has three caps for Peru and his current Transfermarkt market value is €2.00m.