Toto Wolff thinks Lewis Hamilton may have over-managed his Hungarian Grand Prix win, but only because Mercedes warned its drivers to be extra cautious with tyres.While leading a comfortable one-two in the middle stint, Mercedes asked Hamilton to up the pace, to which the world champion said he was driving as fast as the tyres would allow. Mercedes was concerned his slower pace could help third-place Daniel Ricciardo get close enough to jump Nico Rosberg when he pitted.Asked if he thought Hamilton was trying to back up title rival and teammate Rosberg, Wolff said: Im sure he didnt want to back him up. All weekend we were discussing with them that they need to be very cautious on the tyres ... We didnt have any experience on those tyres, so he over-managed it probably.He had everything under control, he knew that Nico was behind him and didnt realise that the [traffic] train was approaching fast and that there was a different strategy behind him, so I guess he didnt have the complete picture and for him it looked OK. Thats why he just took it easy.After Mercedes warned Hamilton it would be forced to pit Rosberg first if the pace did not improve, which would have potentially threatened his lead, his lap times improved and the pair quickly dropped the threat of Ricciardo. Wolff thinks it is easy for drivers to get tunnel-vision about their own race when in the car.These tyres need to go a long way and what he was saying on the radio was that he was driving to the best of my abilities -- that doesnt mean Im driving as fast as I can and I think we needed to make it clear to him that we were running into a problem.Sometimes as a driver you must not forget you are sitting in the car out there, you are managing the pace. You dont see what is standing out around you, you just need to trust the pit wall and I guess at that particular moment we needed to make the message come across and this is what we did.We said, and the seriousness of the message was, you can either say that we are going to reverse the cars like we did in Monaco if you dont pick up the pace, or, we might pit Nico earlier and I think that message was what he needed. What he needed to understand was that the pace needed to be picked up.When Hamilton was asked if he felt worried Mercedes would switch his strategy he said: In my mind it wasnt going to be changing. I wasnt backing Nico up, and if he was quick enough he could have closed the gap if hed wanted to. Im sure after that I was able to pick up my pace and after that he was never a threat.With the tyres, its like having £100 and spending it over the race distance. I just tried to spend it as wisely as I knew. If I had pushed a little bit more at the end, maybe I wouldnt have got to the end the way I needed to. I felt like it was pretty perfectly managed -- I didnt have any problems. John Lynch Jersey . Datsyuk will miss Tuesdays game against New Jersey and could be sidelined longer, while Cleary will likely miss at least the next three games. Its been an injury-plagued season for Datsyuk, who has suited up for just 39 games. Mike Alstott Jersey . 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GLASGOW, Scotland -- Andy and Jamie Murray kept Britain alive in its Davis Cup semifinal against Argentina, winning the doubles match in four sets to reduce the titleholders deficit to 2-1 on Saturday.The Murray brothers beat Juan Martin del Potro and Leonardo Mayer 6-1, 3-6, 6-4, 6-4 in front of a rowdy crowd in Glasgow.The semifinal is extended to the reverse singles on Sunday, when Andy Murray is set to play Guido Pella and del Potro is down to play Kyle Edmund.Two-one down is a tough position to be in, Andy Murray said, but we are closer than we were at the start of the day and I still believe we can come back.Del Potro and Murray were back on court after an epic 5-hour, 7-minute opening singles on Friday, won by del Potro in five sets. Del Potro wasnt slated to play in the doubles andd was a surprise late change by Argentina captain Daniel Orsanic, especially given the players injury problems in recent years.ddddddddddddAs soon as we heard Juan Martin was coming in, they showed their cards, that they wanted to finish the tie today, Britain captain Leon Smith.The Murrays have a 6-0 record in Davis Cup doubles.The winner will play either Croatia or France in the final -- and its likely to come down to the final match, with Murray a heavy favorite to make it 2-2.Everyone is tired, its that stage of the season, Smith said. Its the same for their team but if theres somebody you want going out to get the first rubber on the board, its Andy Murray. ' ' '