'rival against' is correct and usable in written English.
It is typically used to express competing or opposing forces. For example, "The two teams rivaled against each other in the national tournament".
Even so, voters said they considered Mr. Bush more of a leader -- and a more potent rival against the Democrats in November.
Recent surveys predicted that Mr. Ahn, if he became the single candidate representing the liberal South Koreans, would beat Ms. Park, while Mr. Moon would be a much weaker rival against her.
At a previous debate, before the first primary vote, Mr. Yassky seemed to defend his rival against a charge that he had falsely claimed to have worked in a sweatshop as a child.
This, Mr. Lewis wrote in 1990 in a celebrated essay in The Atlantic Monthly (which introduced the catch phrase the political scientist Samuel P. Huntington then made famous) "is no less than a clash of civilizations -- the perhaps irrational but surely historic reaction of an ancient rival against our Judeo-Christian heritage, our secular present and the worldwide expansion of both".
And earlier this month, reports surfaced that Baidu is planning to become a strategic investor in security software company Kingsoft, which would make it an even stronger rival against Qihoo's security business.
China-based Wanda E-commerce, which hopes to position itself as a rival against Alibaba, has raised one billion RMB (about $161 million) in funding from investment funds Shengke Limited and Hong Kong Xu De Ren Dao E-commerce Investment Co. Wanda E-commerce says this quadruples its valuation to 20 billion yuan (about $3 billion).
The game pits two old Conference USA rivals against each other.
Indonesians will vote this week in a national election that pits two old rivals against each other.
Google executives argued that they were more protected than rivals against choppy economic waters.
C1 Rivals Against Common Foe RealNetworks appealed to its Internet music rival Apple Computer, suggesting that the companies unite against Microsoft.
It seems silly to have to argue that officials responsible for counterterrorism should be able to recognize opportunities for pitting these rivals against each other.
