Alves tried his luck from long range 11 minutes before the interval, and Blades' keeper Kenny was forced to punch away his powerful shot.
Dirk Kuyt's close-range finish three minutes before the interval looked to have secured Liverpool a slender lead.
Boyd was not be denied, however, and the young striker scored a sensational long range strike four minutes after the interval - with his 25 yard shot going in off the underside of the crossbar.
David Buchanan put Hamilton ahead before the half-time interval with a long-range, left-footed strike.
Mickael Antoine-Curier gave Hamilton the lead from close range 13 minutes before the half-time interval.
But Richard Agar's side were blown away after the interval, Godwin going over from close range within two minutes of the restart.
Novo appeared as a substitute at the interval and smashed in a terrific long range strike to condemn Falkirk to defeat at a sun-drenched Hampden.
However, Betis hit back with an even better effort as midfielder Ruben Perez -- on loan from Atletico Madrid -- fired in a piledriver from long range to give his side the lead at the interval.
Jacek Krzynowek then had a couple of efforts from long range as Poland gathered momentum, which continued after the interval as well, with Smolarek having a 20-meter shot saved.
The positive approach from Hull had made for a hugely entertaining first 45 minutes as both teams traded blows - and the woodwork made a crucial intervention again just before the interval, this time to deny a close-range drive from Woodgate.
England trailed 12-11 at the interval after a Delon Armitage drop-goal and a close-range try from Nick Easter.
And the home side were soon in front when Gomez was driven over for the try from close range to ensure the hosts took a 7-3 lead into the half-time interval.
Celtic thought they had given themselves a lifeline six minutes before the interval when Scott McDonald turned in Marc Antoine Fortune's cross from close range, but he was correctly ruled offside.
BBC: SPORT | Football | Europe | Arsenal 3-1 Celtic (agg 5-1)
That was as good as it got until shortly after the interval when the tempo started to pick up and John Arne Riise fizzed a long range left-foot strike just wide.
John Carew doubled the lead after his long-range shot was deflected in, but Rovers roared back with Jason Price poking in just before the interval.
O'Gara eventually found his range in the final minute of the first half, landing a penalty to give his side the lead at the interval.
Matt Reynold's poked in the opener from close range and a rocket shot from Konstantin Kalmikov was too strong for the Giants netminder Stevie Lyle but before the first interval Colin Shields reduced the arrears with a well-placed slap shot.
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