Marko concerned by 'dangerous' Mercedes potential
[html]Red Bull advisor Helmut Marko believes it is only a matter of time before Mercedes is challenging for victories every week.[/html]
Source: Marko concerned by 'dangerous' Mercedes potential (http://ht**://www.espn.c**/f1/story/_/id/34056464/red-bull-helmut-marko-concerned-dangerous-mercedes-potential)