SaturdayManchester United vs. Crawley TownEnglish F.A. Cup, Old Trafford, Manchester, 12:15 PM ETIn olden times, the magic of the English F.A. Cup gave little-known amateurs the chance to play the soccer greats on a winner-takes-all basis. If the romance still lives, then Sergio Torres will score a goal Saturday against Manchester United at Old Trafford stadium.This is not the Torres who cost Chelsea £50 million, or $81 million, but his namesake, who paid his own passage from Mar del Plata in Argentina to chase the dream of playing in England.Seven years have passed, and Sergio Torres has stacked supermarket shelves and at 27 has yet to play on the field of giants.He has a delightful attitude toward the sport, open and fresh and up for the challenge of playing against a team that ranks 94 places and 5 leagues above him.But all is not romance: Crawley is the biggest spender, by far, in its own league, financed by secretive overseas backers after its previous owner, Azwar Majeed, was jailed for fraud.Chelsea vs. EvertonEnglish F.A. Cup, Stamford Bridge, London, 7:30 AM ETNo place here for Fernando Torres, either. He is barred from the Cup because he played in an earlier round for Liverpool.Chelsea will instead field Didier Drogba, its leading scorer since 2004, in an attempt to progress in the competition it won last season. A Premier League rematch in the F.A. Cup.Borussia Dortmund vs. St. PauliGerman Bundesliga, Signal Iduna Park, Dortmund, 9:30 AM ETThe whisperers grow louder, and the chasing pack hopes that two successive drawn games and the long-term injury to Shinji Kagawa heralds the decline of Dortmund. Borussia’s coach says nonsense; as soon as the team gets back to basics, it will win again.A lead of 10 points in the Bundesliga will not evaporate in February, though the Hamburg team St. Pauli is on a roll of three consecutive victories to pull away from relegation.SundayNapoli vs. CataniaItalian Serie A, San Paolo stadium, Naples, 2:45 PM ETLike Crawley, Naples has looked down the barrel of bankruptcy and risen again. The southern Italian team, fired by South American strikers, is defying the odds.It has Serie A’s leading scorer, Edinson Cavani, and after 25 matches, Napoli still splits the Milan giants at the top of the standings.On paper, and on form, lowly Catania should not stop the euphoria down south.Corinthians vs. SantosFutebol Brasileiro, Alfredo Schurig stadium, São Paulo, 2:00 PM ETThere has to be life after Ronaldo and Roberto Carlos for Corinthians. An era of repatriating aging stars ended with Ronaldo’s retirement, and Roberto Carlos’s opting for life in the Russian league.Corinthians must find a new way to stop the likes of Santos, whose own effort to hold on to the youngsters Neymar and Ganso is a race against time and money. Chelsea remains eager for the striker Neymar, and A.C. Milan is closing in on the attacking midfielder Ganso.Leyton Orient vs. ArsenalEnglish F.A. Cup, Brisbane Road, London, 11:30 AM ETDown from the clouds after beating Barcelona, Arsenal travels just a handful of kilometers to the humble East London home of the Os.Leyton Orient has been around since 1881, but its existence has largely been hand-to-mouth, Cinderella stuff.But even now, as it fears the proposed move of West Ham United onto its territorial patch once the 2012 Olympic Games are over, the team sniffs a chance to startle the top guns of Arsenal.You beat Barça? Good job. Now welcome to Brisbane Road, capacity 9,271, but no less loved by its supporters.If there is the slightest hint of a Champions League hangover, the Os will run and run until Arsenal’s stars have had enough. That, too, is the allure of the oldest cup competition on earth.