Underhand Service: A service whereby a player serving delivers the ball with his or her racquet below shoulder level. In intermediate level tennis this is considered unusual but an acceptable ploy. In upper-intermediate and professional events, the practice would generally be considered insulting, but there may be exceptions (for example, if the server is injured). Perhaps the most famous example was executed by michael chang, suffering from severe cramps, against ivan lendl in their epic fourth-round match in the 1989 french open.

 

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Underhand Service: A service whereby a player serving delivers the ball with his or her racquet below shoulder level. In intermediate level tennis this is considered unusual but an acceptable ploy. In upper-in . . . View Full Definition

Point-Of-Service (POS) Plan: A health plan allowing the member to choose to receive a service from a participating or non-participating provider, with different benefits levels associated with the use of participating providers.

Point-Of-Service (POS) Product: A healthcare option that allows members to choose at the time medical services are needed whether they will go to a provider within the plan's network or seek medical care outside the network.

Personal Communications Service (PCS): A second-generation digital voice, messaging and data cell phone system in the 2GHz range. PCS is supported mostly by GSM. PCS systems use a different radio frequency (1.9 GHz band) than cel . . . View Full Definition