The Boks clinched their second southern hemisphere title in a row for the first time following a nail-biting 29-27 victory against a determined Argentinean outfit at the Allianz Stadium, Twickenham, in London on Saturday, which marked their second victory against the Pumas in a row.

The result was enough to seal the the title despite the All Blacks registering a bonus-point 28-14 victory against Australia in their final match, which saw the teams finish the competition tied on 19 log points.

“It’s a bit surreal, to be honest – I don’t know how to express it,” said Marx, who scored a second-half brace to help the Boks to the win.

“I’m just extremely grateful for everything that’s happened over the past couple of weeks, the lessons learned, and the victories we registered.

“It will probably sink in over the next couple of days what we achieved, but that said, there’s still a lot of hard work ahead. There are still lots of aspects we can get better at.

“I’m lost for words. I’m extremely grateful for the support from the fans that came out from far and wide, no matter where we played. They supported us all the way, and that’s special for the team and coaching staff.

“There were highs and lows, but we stuck to it and got through it together.”

The double Rugby World Cup-winning hooker gave Argentina credit for the way they fought in the match and said they expected nothing less from them following their 67-30 defeat in Durban last week.

“We definitely expected them to come back like that,” said Marx.

“They are a proud nation and a great rugby team. It was a tough match, and the closeness of the scoreline showed it. We knew how tough they were last year when they beat us away (in Santiago del Estero).

“It was obviously a different story when we got back home this year. But even though it was a challenging match, this weekend was very special for us.”

A group of players will depart for South Africa on Sunday and will arrive at home on Monday, while several others have joined their respective clubs and provincial unions.

Springbok coach Rassie Erasmus is set to announce his squad for their five-match November tour before the squad reassembles later in October.