Players from the South Africa rugby squad switched their focus to a different sport for the day when they visited the Chelsea football team in Cobham on Thursday.
The Springboks took a break from preparations for this weekend's World Cup semi-final against New Zealand.
Chelsea's media team uploaded a string of pictures and Vines on social media, one of which showed Diego Costa's surprise at the size of the rugby stars.
South Africa reached the final four by sealing a 23-19 victory over Wales at Twickenham in the quarter-finals last weekend.
Diego Costa was on hand to welcome members of the South Africa Rugby World Cup squad to Cobham yesterday...— Chelsea FC (@ChelseaFC) October 23, 2015