▁League ▁match ▁against ▁Milan ▁at ▁the ▁Camp ▁N ou , ▁he ▁employed ▁this ▁t actic ▁with ▁most ▁of ▁his ▁players ▁available ▁for ▁selection . ▁As ▁manager ▁of ▁Bayern ▁Mun ich , ▁he ▁also ▁employed ▁a ▁ 3 – 4 – 3 ▁formation ▁during ▁the ▁first ▁leg ▁of ▁the ▁Champions ▁League ▁semif inal ▁against ▁old ▁club ▁Bar ça . ▁ ▁Although ▁much ▁emphas is ▁is ▁placed ▁on ▁retain ing ▁possession ▁of ▁the ▁ball ▁and ▁dict ating ▁play , ▁Guard i ola ' s ▁teams ▁are ▁recogn ised ▁for ▁pressing ▁off ▁the ▁ball . ▁Play ers ▁press ▁and ▁har ry ▁the ▁opposition ▁collect ively ▁in ▁an ▁attempt ▁to ▁win ▁back ▁possession ▁of ▁the ▁ball . ▁This ▁collect ive ▁press ▁is ▁only ▁conducted ▁in ▁the ▁starting ▁third ▁of ▁the ▁opposition ' s ▁pitch ▁where ▁less ▁space ▁exists ▁and ▁def enders ▁and / or ▁the ▁goal keeper ▁may ▁not ▁be ▁as ▁good ▁d rib bling ▁or ▁passing ▁the ▁ball ▁as ▁a ▁mid f iel der . ▁At ▁Barcelona , ▁this ▁was ▁referred ▁as ▁the ▁" six - second ▁rule ", ▁in ▁that ▁the ▁team ▁should ▁aim ▁to ▁win ▁back ▁possession ▁of ▁the ▁ball ▁within ▁six ▁seconds ▁as ▁this ▁was ▁the ▁time ▁when ▁opposition ▁players ▁may ▁still ▁be ▁out ▁of ▁position ▁following ▁turn over ▁of ▁possession ▁and ▁most ▁sus cept ible ▁to ▁being ▁dispos s essed ▁or ▁forced ▁into ▁a ▁mistake . ▁If ▁possession ▁of ▁the ▁ball ▁was ▁not ▁won ▁back ▁within ▁six ▁seconds , ▁players ▁would ▁abandon ▁the ▁collect ive ▁press ▁to ▁con serve ▁energy ▁and ▁revert