Michael Bradley and Jermaine Jones' partnership in midfield is becoming a very vital one for the USA national team.

AS Roma's and Schalke 04's Jones are the two who are leading the way in central midfield for Juergen Klinsmann's side and the German tactician is thrilled with the contribution the pair has been making lately, particularly in the 1-0 World Cup qualifying win over Costa Rica on Friday.

"It's very crucial, the partnership between Michael Bradley and Jermaine Jones. It's really important that they develop a real fine-tuned understanding that when one goes forward and is attacking, the other has to secure him and stay back." Klinsmann told ussoccer.com.

"Here and there they both end up in the opponent's penalty area and you leave kind of a hole behind. Those are things we would love to work on in the near future, when we play both next to each other and maybe we play without a No. 6 that secures them.

"It only works if one stays and the other goes, and this is very important. Hopefully now we have the time and more training sessions before a game to work on that, and I think in time if we develop that fine-tuned understanding between these two guys then we have a big plus."

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