Carrick hasn't worked with Payero, with the midfielder having left for Boca on loan before the current head coach's appointment in October.

Source: https://www.thenorthernecho.co.uk/sport/23489201.middlesbrough-martin-payeros-boro-boca-juniors-situation/?ref=rss

In his only season at to date, Payero made just 15 appearances in total, seven of which were starts.

Source: https://www.gazettelive.co.uk/sport/football/transfer-news/martin-payero-potential-chance-middlesbrough-27208149

Martin Payero joined the club 24 months ago from Banfield in Argentina, while Matthew Hoppe joined last summer from Mallorca having previously impressed in the German Bundesliga.

Source: https://www.gazettelive.co.uk/sport/football/transfer-news/middlesbrough-transfers-fa-new-ruling-27129001